Quality 8.4V 6800mAh 4 x NCR18650B Battery Pack at Kaidomain.com for reasonable price- Mtbr.com
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  1. #1
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    Quality 8.4V 6800mAh 4 x NCR18650B Battery Pack at Kaidomain.com for reasonable price

    Guys I have very good news. Kaidomain has published avability of high capacity 68000mAh battery pack out of 4 Panasonic NCR18650B with 6A protection module. Price at the moment is very good $29.23.

    So far I'm entitled to provide this information. I'm going to get sample for review, but it will take some time to get it. So far I have a lot of trust to the KD and have no reason not to beleive them. I hope it stays so.

    Name:  635809321105597051_small.jpg
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    Here is the link: http://kaidomain.com/bike-lights-and...n-Battery-Pack

    Discussion is wide open, but will reserve next post for reviewing purposes.

    EDIT: Might be of some interest - 6 and 8 cell packs are in the production I've been told. Links to the products:

    http://kaidomain.com/bike-lights-and.../battery-packs

    EDIT 2: KD will try to make also 2 cell (2S1P) pack in the same style but with NCR18650GA 3500mAh / 10A cells. Will add link later if avalaible.

    EDIT 3: (7th Dec 2015)
    - 2 cell (2S1P) announced to be in the production. Currently it is without pouch, but they are working to get one
    - 4 cell FLAT (2S2P) pack is also announced. Not much detail known yet.

    EDIT 4: (21th Dec 2015)
    - 2 cell (2S1P) pack with:
    10 cm cable: http://kaidomain.com/bike-lights-and...ith-10cm-Cable
    60 cm cable: http://kaidomain.com/bike-lights-and...n-Battery-Pack

    EDIT 5: (28th Dec 2015)
    - 4 cell (2S2P) FLAT pack:
    http://kaidomain.com/bike-lights-and...n-Battery-Pack

    EDIT 6: (2nd Dec 2016)
    20 AWG Extension cable:
    http://kaidomain.com/Electrical-or-T...e-100cm-Length

    Edit 2nd Aug 2016: Corrected product links
    Edit 2nd Dec 2016: Added link for extension cable
    Edit 1st Aug 2018: Corrected product links on a new KD server
    Edit 17th Oct 2018. Again corrrected some links
    Last edited by ledoman; 10-17-2018 at 12:59 PM.

  2. #2
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    Reserved for review.

    Reserved for review.

    Some crumbs in advance (needs to be verified):

    1. They have listened and used 20AWG cables. Very good! Checked -> TRUE.
    2. 6A protection module. Should cover most of our needs, even for hi powered lights. Unchecked yet.
    3. Ruberized shell. Checked -> TRUE
    4. Nice pouch
    5. Proven high capacity about 6400mAh.

    Discharging graph at 2A (1A per cell). I've got nice capacity of 6322mAh down to 3V per cell. I could go lower to gain additional capacity, but I've already expected to be 6400mAh under some reasonable load.
    Discharge curves are nice and cells match very well. There was bit less than 0.01V of difference.



    Here are some pictures:
















    It can stand more than 6A load:
    Last edited by ledoman; 11-28-2015 at 11:10 AM.

  3. #3
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    Can I used it with Nitefighter BT70??

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    Yes of course it can be used with BT70. 6A of constant current should be more than enough. You might also consider 6 cell version which is still in the production if the running time needs to be longer. Timeframe for avability is unknown to me.

  5. #5
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    Could you also check for the bigger model with 10200mAh?
    http://www.kaidomain.com/product/Details.S024443

  6. #6
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    As said 6 cell one is still in the production. 4 cells described above are orderable and in stock (as I have been informed).

  7. #7
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    Great news! I was wondering the status of this!

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  8. #8
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    YAY: Great price too... if it's really 18650B cells.....

    BOO: I just ordered cells without rubberized shell & no case from Hunk Lee... for more $$


    Quote Originally Posted by garrybunk View Post
    Great news! I was wondering the status of this!

    -Garry

  9. #9
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    Should be geniue NCR18650B. Lately prices have gone down for those cells. I agree it should be proved, but so far I have trust to the KD. The price of the pack in not in the cheapo category.

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    Let me prepare you with some things you would shurely want to know. Voltage curve during discharge of Pannys NCR18650B is somewhat linear. Some other cells like Sanyo has higher curve. This has influence on the status leds, specialy the ones with 4 stages like BT40s and similars. Status is shown by colors based on the actual voltage level. Different lights has different tresholds (+ some variance) so the users can have different experiences using different lights and different battery packs.

    Quality 8.4V 6800mAh 4 x NCR18650B Battery Pack at Kaidomain.com for reasonable price-hkj-comparator-sanyo-2600-vs-panasonic-3400.jpg
    Source: Battery test-review 18650 comparator

    On the graph above you can see Sanyo is higher than Panny at same load, but has big drop when exhausted. This would mean user would have green/blue light for a long time and then all of the sudden orange/red/blinking. On the other side Panny would show more linear behaviour.

    So we need to understand how the things are working before we can say one is better than the other and it always dependable on the aplication (tresholds in our case). Hope you got the point.

  11. #11
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    ledoman have you ran the tests at the higher currents, 2A and 3A?

  12. #12
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    Tests of what? If you meant comparator, here it is:

    Hopefuly I would manage to upload..... having some problems... I've managed it

    Quality 8.4V 6800mAh 4 x NCR18650B Battery Pack at Kaidomain.com for reasonable price-comparation-panasonic.jpg
    Last edited by ledoman; 11-19-2015 at 06:58 AM.

  13. #13
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    curious about your test of the battery pack - subscribed
    ..just ride...

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    Are you sure that velcro pouch is included, did they confirm it?

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    It should, but will ask.

    EDIT: it is confirmed it comes with pouch just as can be seen on the pictures.
    Last edited by ledoman; 11-19-2015 at 11:20 AM.

  16. #16
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    Watching this closely...If these are the real deal they will sell out quickly. Ledoman, big thumbs up for the heads-up. If I was in the market for a battery I'd be jumping on one of these real fast.

    Of course I need to remind people that there is still some problems getting Li-ion batteries shipped from China. Hopefully Kaidomain has figured a way to ship these without delay...which, may be a very important issue if you are considering buying one of these.

  17. #17
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    Will ask KD about shipping options either, but are somewhat dependable on destination country, AFAIK. Gearbest EU warehouse does not deliver to my EU country, for example

    EDIT: KD told me they are only using Sweeden post for bateries. It's not the fastest but KH post refuses to ship them.
    Last edited by ledoman; 11-19-2015 at 10:39 AM.

  18. #18
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    I have this battery pack from KD.
    I'm not interested in opening it up because I don't have anything to wrap it up again. I have used it on one nightride with SSX2 light from KD. I think I had that light on for about 2 to 2,5 hours and I kept it on higher level. When I got home I had 2 of three battery indicators left.
    Hope this helps, I don't have any equipment to do any precise measuring.
    Yes it came with pouch
    Last edited by MartinMK; 11-19-2015 at 03:29 PM. Reason: Detail about light

  19. #19
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    Martin, thanks for the info. One thing you can do more - are there some AWG markings on the cable?
    I'm going to do more detailed review when I get it. Hopefuly this will be soon.

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    It is marked as 20 AWG. But cable is thinner than on nitefighter battery.

  21. #21
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    Good. It might have thinner coating.

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    ..just ride...

  23. #23
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    Im waiting on a set to get here to test and confirm everything with them

  24. #24
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    which one: the KD or GB Version?
    ..just ride...

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    Hopefully GB has resolved tramendious shipping issues. I'm just about 60 days of waiting for my second BT21. Another not light related stuff is in "Preadvised" status at NL post for 3 weeks since it has been "shipped". WTF.

    Tig, are you going to tear down the pack so the PCM could be inspected? Would be really interesting to see if there is the same manufacturer behind.

  27. #27
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    @mtrain: yes
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  28. #28
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    On GB product photos those texts on that cable seem to me as exaxtly the same as on KD battery pack i have

    Edit:
    Looking on GB pictures at computer screen i noticed that their battery pack has 22AWG wire.
    Last edited by MartinMK; 11-20-2015 at 01:42 AM. Reason: mistake

  29. #29
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    This is I've just wanted to point out. Magnifying the picture at GB would show it has 22AWG.

  30. #30
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    Quote Originally Posted by ledoman View Post
    This is I've just wanted to point out. Magnifying the picture at GB would show it has 22AWG.
    yes, but look at this Picture at KD https://manager.kaidomain.com/Upload...1478948405.jpg
    there is also the 22 AWG cable pictured!!
    ..just ride...

  31. #31
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    Hmmm, yes you are right. Will ask representative at KD about it.

    I know KD has make a big batch for special customer before. Pictures might also be from that batch. Will try to clearify.

  32. #32
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    22awg cable isn't the end of the world for these little lights we use. But the KD and GB version should be the same (that was the goal when I helped GB find them).

    Ledoman, of course. The reason im getting a 4 and 6 cell sample is to MAKE SURE they are what they are supposed to be.

    Also guys the GB shipping issues is partially nitefighter simply getting overwhelmed with the demand for their lights. Obviously shipping issues (as im finding there is problems with anything that has lithium batteries going out via certain methods, shipping companies are stopping and not releasing the packages) and internal issues all made the problem 10x worse.

    But were working on it.

  33. #33
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    When i ordered from KD it was stated as 22AWG but it took a long time for them to ship it, at some point I sent them a mail and asked whats up, they replied that they are chancing cable from 22AWG to 20AWG ant that is the reason for shipping delay.

  34. #34
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    Yeah, I know. 22AWG is still usable, but 20AWG would help with minimize voltage drop on higher powered lights. And we are all into that more and more (with BT21, BT70 and similars). Maybe 22AWG is not so important now, but bateries last 5 years or even more. You would want to use them with new lights at that time. So to me is still important.

    Well my shipping issues has nothing to do with Nitefighter - it was in stock at the time (18th Sept). It is more GB and some carriers related. There are not only lights and batteries that are missing. There is a long thread about shipping issues over at BLF - GearBest shipping issues survey in BLF | BudgetLightForum.com
    Last edited by ledoman; 11-20-2015 at 05:59 AM.

  35. #35
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    Ya I know about that thread, which I why I made sure to mention all points as its not 100% gearbest problems. Their change in shipping companies and failure to show items not in stock created alot of issues.

    Im working on making sure packs are up to standards we want. I know too well of voltage sag issues, my DIY light uses a 2 pin threaded connector similar to solarstorm but wire is 16awg. Overkill for the most part but turbo output is 4.5A (1.5A/emitter, xp-g2) and voltage sag is almost nothing more than that of the cells. Wire is far too big to use in any of these lights but I wanted to see how much of a difference it made above 2A draw.

  36. #36
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    Yup, over the thumb, somewhere between 2 and 3A differences between 22 and 20AWG should show up. This is just a BT21 on turbo (well not my one, mine resent one still starts at 2.1A on turbo ) But let not derail to much this thread.

    Hopefuly will get answer on AWG used today.

  37. #37
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    This Gearbest battery with its price is really tempting, I will probably order one.

  38. #38
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    I ordered from kaidomain the 6 cell ,once I get and test it I'll post☺

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    AFAIK those are still in the production, so not in stock. Don't know for the timeframe, but will ask.
    How do you intend to test it, do you have any equipment?

  40. #40
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    As I thought KD has left old pictures from the batch for special customer. They are going to update the pictures ASAP.

    KD also infomed me there are some "klones" of that battery pack. They wouldn't say which one and who did it. Don't know why but they just said there isn't any copyright on it. They also told me the customers would find out.

    Well, we would need to do some tests.....
    Last edited by ledoman; 11-21-2015 at 01:00 AM.

  41. #41
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    Should I be concerned that a search of the KD description does not mention the manufacturer, Panasonic? It's not difficult for someone to make a product with the same part number as a competitor.

  42. #42
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    No I don't think you should be worried. But if you want to be on the safe side just wait for about a week when I'm expecting to get test sample. Then all will be clearified. Currently it is still in Hong Kong

    BTW. I've been told 6 and 8 cells pack are ought to be in stock in about week.

  43. #43
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    any chance of them making 2 cell packs?

  44. #44
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    Will ask, good idea. If they do, it will probably take some time, since the KD is not the manufacturer and they need to make new tools for ruberized shell.

    Would be also good if we know what is demand for such pack. I'm shure there is plenty for 4 cells pack, some for 6 and at last 8 cell. Maybe we should open new thread?

    Anyone thinking how to charge those hi capacity beasts? Most of our chargers would need a lot of time....

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    I'm in for some 2-cell packs too!!
    The rubberized Shells and pouches do exist already and KD just Need to source them from a supplier!
    ..just ride...

  46. #46
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    Do you have any link to 2 cell ruberized pack? It might be easier for KD to see how it should look.

    Question to all: Do you think we need for 2 cell pack same 6A PCM as with 4-8 cell packs or some cheaper PCM could be used? To me 4A should be good enough.

  47. #47
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    MJ-6008 2 Cell Waterproof Battery - Action-LED-Lights

    Very nice pack, nice coating, maybe not 2200ma batteries, great for backup. I put my HunkLee 3400ma 2 cell in the pack after coating with Plastidip.

    Post pics of your helmet/light setup.- Mtbr.com

    Quote Originally Posted by ledoman View Post
    Do you have any link to 2 cell ruberized pack? It might be easier for KD to see how it should look.

  48. #48
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    4A should do it for a 2 cell pack I believe. 3A would be acceptable.

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  49. #49
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    3-4A protection and 3400mah Panasonics make a good 2 cell pack. Be a good option to have.

    8cell packs I couldn't imagine carrying one of those . Already think 6 cell is a bit heavy.

  50. #50
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    I don't think there is any reason for an 8 cell pack either if it's built with 3000mAh+ cells. Now if it's built with 2000mAh cells that's another story, but I wouldn't buy that anyway!
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  51. #51
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    A 2 cell pack should actually be built with cells that are better performing with less voltage sag like the Panasonic 3500mAh NCR18650GA or the LG 18650MJ1 3500mA. These will allow max brightness for longer on a hard driven XM-L2 light (i.e. BT21). I just picked up two of the LG's for my Fenix two cell case & BT21 on my helmet.

    There's a discharge test posted at BLF (somewhere) that shows how much lower the Panna 3400 really is

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  52. #52
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    Ya im loving my ncr18650ga cells

    Actually a 2 cell, 26650 pack 5200mah cells...long run time, not much heavier (about same as 2 cell in fenix case). Oh and the cells arent any more expensive than quality 18650s.

  53. #53
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    Quote Originally Posted by garrybunk View Post
    A 2 cell pack should actually be built with cells that are better performing with less voltage sag like the Panasonic 3500mAh NCR18650GA or the LG 18650MJ1 3500mA. These will allow max brightness for longer on a hard driven XM-L2 light (i.e. BT21). I just picked up two of the LG's for my Fenix two cell case & BT21 on my helmet.

    There's a discharge test posted at BLF (somewhere) that shows how much lower the Panna 3400 really is

    -Garry
    Interesting. This is the first I've heard of these new cells. Seems the newer Panasonic's are a product of the recent acquisition/merger with Sanyo. I'll have to pick me up a couple of these for those times when I want to go "wireless" by using a torch on the helmet. I just hope they fit in the torch. I'll have to check the size first just to be sure they will fit inside the torch host.

  54. #54
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    They are just standard 18650 cells size wise. They should fit nicely. Both are very nice cells indeed. To bad HKJ doesn't have them on his comparator (yet). We would easily compare to the NCR18650B.

  55. #55
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    Here is the comparison graph posted over at BLF:


    This chart shows the GA vs. the LG MJ1 & Samsung 35E:


    Posted from this thread.

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  56. #56
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    Nice find, Garry! There is about 0.1V difference at 3A load. Not whole that much, but still noticeable.

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    Quote Originally Posted by ledoman View Post
    Do you have any link to 2 cell ruberized pack? It might be easier for KD to see how it should look.

    Question to all: Do you think we need for 2 cell pack same 6A PCM as with 4-8 cell packs or some cheaper PCM could be used? To me 4A should be good enough.
    here you can see a Version from DX: Rechargeable Water Resistant 8.4V 2600mAh 2 x 18650 Li-ion Battery Pack - Black - Free Shipping - DealExtreme

    but the cells inside are crap - tested it some time ago - just to find out they are crap!

    Yes i think a 4A pcm should be ok for the 2-cell packs - as i think they should not be used on the high power lights we have, but for a good helmet light they are perfekt!!

    Edt: for refrence anoher crap pack from DX: Water Resistant 2 x 18650 1800mAh Battery Pack for Flashlight - Black - Free Shipping - DealExtreme
    ..just ride...

  58. #58
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    Be nice if Gearbest or KD would make up a 2-pack with decent cells in this case.
    I have the Fenix cases, but they're hard for others to find.

    Quote Originally Posted by Whitedog1 View Post
    here you can see a Version from DX: Rechargeable Water Resistant 8.4V 2600mAh 2 x 18650 Li-ion Battery Pack - Black - Free Shipping - DealExtreme

    but the cells inside are crap - tested it some time ago - just to find out they are crap!

    Yes i think a 4A pcm should be ok for the 2-cell packs - as i think they should not be used on the high power lights we have, but for a good helmet light they are perfekt!!

    Edt: for refrence anoher crap pack from DX: Water Resistant 2 x 18650 1800mAh Battery Pack for Flashlight - Black - Free Shipping - DealExtreme

  59. #59
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    Now that's what I talking about. Rubber case and all that, get those with good cell's and were in business!

  60. #60
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    this Hunk Lee 26650 pack looks nice, FMA LiIon Battery Pack 26650

    Quote Originally Posted by tigris99 View Post
    Ya im loving my ncr18650ga cells

    Actually a 2 cell, 26650 pack 5200mah cells...long run time, not much heavier (about same as 2 cell in fenix case). Oh and the cells arent any more expensive than quality 18650s.

  61. #61
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    Nice, seems like a new listing too. Only one he has. If I was to go that route Id want a waterproof casing though. Rubber like what is shown in the beginning of this thread. My helmet light battery goes on the helmet too and at least right now, its too wet to have the cells more or less exposed (ton of snow)

  62. #62
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    I dip my HunkLee 3400ma 2 cell 3 times in a can of Plastidip, works great.

    Quote Originally Posted by tigris99 View Post
    Nice, seems like a new listing too. Only one he has. If I was to go that route Id want a waterproof casing though. Rubber like what is shown in the beginning of this thread. My helmet light battery goes on the helmet too and at least right now, its too wet to have the cells more or less exposed (ton of snow)

  63. #63
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    Ive used that stuff alot back in my rc days, good stuff. Forgot about it till now.

  64. #64
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    Quote Originally Posted by tigris99 View Post
    Ive used that stuff alot back in my rc days, good stuff. Forgot about it till now.
    Works well, but... Stinks to high heaven in bulk, fumes are carcinogenic. Dries out in the container too.
    I prefer to wrap in self-fusing silicone tape for waterproofing, then wrap with heat shrink for toughness.
    Oh, I also paint on a little plasti-dip on the remaining openings in the heat-shrink with a tiny brush, but it's probably overkill.

  65. #65
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    Today I'm about to get pack from the OP. Will do some preview at least. Capacity measurements will take quite some time....

  66. #66
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    Quote Originally Posted by patski View Post
    this Hunk Lee 26650 pack looks nice, FMA LiIon Battery Pack 26650
    My current battery pack is an 8.4v pack. I see that this pack is 7.4v. I am looking for a replacement pack for my Solar Storm headlight. Is this compatible? Any adverse effect with the voltage difference?
    "Son, The world needs ditchdiggers, too"-Ted Knight, Caddyshack

  67. #67
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    We should stick with the OP. All about HL packs should be posted in aproprate thread.
    http://forums.mtbr.com/lights-night-...-a-834295.html at least.

  68. #68
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    I've did some pictures of the pack I've got. You can see them in the post
    #2.

    So far everything is as expected. Good pouch, ruberized shell, Panasonic NCR18650B cells inside. Proper initial voltage and balanced cells at 3.62V.
    Currently I'm charging the pack. Testing capacity will take quite some time since discharge should run about 4 hours at 2A load. Hopefuly I'll find time soon.

    Another good news is the KD will try to make 2S1P pack with Panasonic NCR18650GA (3500mAh /10A) cells mentioned above. How long it will take it's unknown yet, but will try to keep you informed.

  69. #69
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    Quote Originally Posted by ledoman View Post
    Another good news is the KD will try to make 2S1P pack with Panasonic NCR18650GA (3500mAh /10A) cells mentioned above. How long it will take it's unknown yet, but will try to keep you informed.
    Yes that is really a good Info! This pack should be light and should have some serious power for our lights!
    Last edited by Whitedog1; 11-24-2015 at 11:20 PM.
    ..just ride...

  70. #70
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    Great news ledoman! Honestly, I think I'd support KD before GearBest right now (given the choice to buy the 2S2P pack either place).

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  71. #71
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    I see you used my same idea on using those little lcd volt meters connected to the DC plug to check pack voltages! I plan on carrying mine on the bike to check packs as-needed.

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  72. #72
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    Does somebody know when the 2s2p packs (which ledoman is testing at the moment) are available from KD?
    They are still in production are they?
    ..just ride...

  73. #73
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    2S2P packs at KD are already avalaible. I can ask how many are in stock right now.

    2S3P and 2S4P are still in the production, afaik. The 2S1P is annouced to be produced, but this will take some time I think.

  74. #74
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    great thank you!
    ..just ride...

  75. #75
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    I need to test the capacity, though. But I can expect to be good since the charging took quite long time (the whole evening). Disconnected the charger when cells were at 4.21V. Over the night voltage has dropped to 4.18V. This is OK, since the cells weren't fully topped.
    There is no visible sign not to believe cells are geniue NCR18650B. Will do also discharge graph so everything will show up.

  76. #76
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    Finished discharging process at 2A (1A per cell). I've got nice capacity of 6322mAh down to 3V per cell. I could go lower to gain additional capacity, but I've already expected to be 6400mAh under some reasonable load.
    Discharge curves are nice and cells match pretty well. There was bit less than 0.01V difference.


    So it proves the cells are good and discharge curve match the ones from HKJ comparator.


    I'm happy I can tell this is good pack. It is only PCM left to test.

  77. #77
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    Anyone who needs a MS type battery for a bike light and / or is planning on buying a bike light without battery, you need to be jumping on this right now while they are available. From what Ledoman has said these look like they are pretty good batteries. no reason to wait for any more details. Buy them while you can, they will probably sell out quick.

  78. #78
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    Now the question is whether GB batteries which are cheaper a little bit are the same or not. Probably it is safer/faster to order them from KD, but I am in a no hurry.

  79. #79
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    Quote Originally Posted by ledoman View Post
    Ordered, thanks Ledoman.
    I'm keen on a 2 cell too when available.

  80. #80
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    Yes it looks very good so far. Currently I'm not aware of any 2S2P pack out there to beat this one when you look at the price/performance ratio. Might be wrong, though.

    Will encourage KD to develop 2 cell pack asap.

  81. #81
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    Nice, now when it is confirmed I can suggest this battery to my friends.

    If i'm correct I used voucher code when ordering this battery and i got it for 25,63usd.
    Now i used google to search for a voucher for KD and found this KDBN11 it is stated as Black Friday And Cyber Monday Deals! You get this battery for 26.01usd when using it.

  82. #82
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    MartinMK thank you, ordered. I rather give a few $ more and buy verified KD version than the one from GB.

  83. #83
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    KD informed me they have enough Panasonic 2S2P packs in stock. They didn't define what is "enough", though.

    Anyway, I can confirm it is worth to buy for anyone who wants good battery pack even for the future use. If you take care, they should last 5 years, at least.
    Taking care includes storing it in the colder places and at 40% charge level (about 7.4V) when you don't intend to use it for longer period.

  84. #84
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    So these packs have a good built-in protection so they switch off when charging or are "empty"?
    Last edited by Jaco P.; 11-28-2015 at 02:16 AM.

  85. #85
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    In the post #2 you can see the picture of PCM. Since it is welded and not soldered it is hard to remove it nicely. I don't want to ruin those new cells doing full tests on them.
    Based on ICs used I would conclude the protection is implemented properly. But I'm not EE so I can't tell for shure. I'm waiting Archie to respond and comment it.

  86. #86
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    I've tested PCM load with two lights in parallel. One was BT21 and the other was 6 up ligfht moded to run at high power. It can easily stand more than 6A load:



    In fact I've got 7A for a moment, just before 6 up light step down because of the heat.

  87. #87
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    Great! Thanks for the testing ledoman! Hope we don't see supply issues with this pack!

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  88. #88
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    Hopefuly KD is well prepared. They are aware of this thread and I'm shure they are reading it. I'm glad we have finaly found good battery pack for reasonable price. There are some small things to be improved, but overall it is very good.

    For example:
    1. I would suggest to use capton tape to insulate PCM leads from the cells.
    2. PCM leads could be little wider to lower the resistance at higher loads.

  89. #89
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    I just noticed there was no insulating tape on the protection PCB. very odd, could be a probably after a fair amount of time with heavy use.

    Definitely one of those things they need to know about and get fixed. Not a huge deal to start with but being the outside of the cell is ground, eventually PCB can wear through the outer plastic and cause issues. Thankfully their Panasonic cells, so even in the rare case the pack is damaged, they arent going to go critical.

  90. #90
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    I agree, tig. I'll let them know. Since pack is in the rubber shell it is less likely something that would happen, but they should minimize those risks. Not a lot of work, just 1-2cm wide chunk of capton tape under PCB on the whole battery lenght + the part where PCM leads are bent.

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    Thanks ledoman for all your work with KD on this. Any chance they might be willing and able to bring a flat 2S2P pack into production? Now that the weather is cold, would be convenient to keep the batteries inside jersey pockets under a jacket. Know I'd purchase a couple packs in a flat configuration right away.

    Also would like to see their packs with the same kind of integrated rubber straps as Magic Shine uses think KD already offers some crappy batteries set up this way. I know Archie will disagree will me on their usefulness in cold weather, but I've not had a problem with my MS batteries that came like this. Am getting tired of all this Velcro my all-weather jacket cuffs and all three pairs of riding gloves are fastened with it, am always getting my other battery packs stuck on the loose ends when trying to get them on and off my bikes. Argh!

  92. #92
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    2s1p flat packs are already in production at KD - as far as i know from ledoman!
    These packs are perfekt for carrying in the pocket as well as for a helmet light!
    ..just ride...

  93. #93
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    Quote Originally Posted by Whitedog1 View Post
    2s1p flat packs are already in production at KD - as far as i know from ledoman!
    These packs are perfekt for carrying in the pocket as well as for a helmet light!
    Are these packs with the 3500mah panasonic cells?

  94. #94
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    Not they are with 3400mah Panasonic cells

  95. #95
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    Quote Originally Posted by Ivan87 View Post
    Are these packs with the 3500mah panasonic cells?
    according to the info i have from ledoman they are going to build it with the new Sanyo/Panasonic NCR18650GA cells!
    ..just ride...

  96. #96
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    thats excellent news

  97. #97
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    AFAIK, Kaidomain said they would try to make 2S1P pack with NCR18650GA cells. There is no info they are in production yet. At least I'm not aware. I know they are NCR18650GA selling on their site so I assume they have some larger batch.

    Will ask also about flat 2S2P pack, but I doubt it. Not shure if rubber shell exists for it. Has anyone seen it elsewhere?

  98. #98
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    Haven't seen a MS style flat 2S2P pack, but OLight makes (or did make) a flat power bank, one model was slightly curved maybe to fit against the hip (came with a belt clip.) Dunno whether their connectors are compatible with MS; they don't seem to have any bike specific lamps on the market.

    Would really prefer a flat 2S2P over a 2S1P, don't like having to take off my gloves to change batteries in the cold.

    Thanks again ledoman!

  99. #99
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    Hunk Lee has this, Protected Li ion Battery 7 4V 6200mAh by Panasonic 18650 Cell 2S2PB w PCM bms In | eBay

    Quote Originally Posted by ledoman View Post
    Will ask also about flat 2S2P pack, but I doubt it. Not shure if rubber shell exists for it. Has anyone seen it elsewhere?
    Quote Originally Posted by andychrist View Post
    Would really prefer a flat 2S2P over a 2S1P, don't like having to take off my gloves to change batteries in the cold.
    Quality 8.4V 6800mAh 4 x NCR18650B Battery Pack at Kaidomain.com for reasonable price-s-l1600.jpg

  100. #100
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    Quote Originally Posted by ledoman View Post
    Will ask also about flat 2S2P pack, but I doubt it. Not shure if rubber shell exists for it. Has anyone seen it elsewhere?
    No, but aluminium shells for flat 2S2P packs are widely available...

  101. #101
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    Woohoo, mines shipped.

  102. #102
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    Mine "shipped" a week ago but it still doesn't show up in tracking. What have the rest of you experienced with tracking KD shipments?

  103. #103
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    That's why I dont buy from KD, last time I did they said shipped, but they didn't actually give it to the shipping company till 2 weeks after I got shipping confirmation.

  104. #104
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    what shipping company? Hunk Lee sends me a "shipped" email and tracking code, about 10-15 days later it shows up in a Fedex Depot in NJ..... another 5 days to Sacramento.

    Quote Originally Posted by tigris99 View Post
    That's why I dont buy from KD, last time I did they said shipped, but they didn't actually give it to the shipping company till 2 weeks after I got shipping confirmation.


    Quote Originally Posted by gmcttr View Post
    Mine "shipped" a week ago but it still doesn't show up in tracking. What have the rest of you experienced with tracking KD shipments?

  105. #105
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    KD has been always reliable to me on all regular orders. Timing for some things might have variations as they have with all China sellers. This is fact we all should take into account.

    My last order of battery pack has been shipped on 27th Nov. with registered HK post and it doesn't show at HKpost stracking system. Not worried as I know it can take quite some time to be routed to my direction. US people might be somewhat spoiled by shorter delivery times. For me 3 weeks is an average.

    gmcttr, which postal service you have got? If it was Sweeden post, then it might be routed to Santa's first as they are pretty close

    Edit: Another very well known seller here has shipped an item to me like this:

    Ordered Oct 26, 2015
    2015-11-02 08:18 The item is pre-advised
    2015-11-27 00:00 NLAMSE, Arrival in exchange post
    2015-11-27 00:00 NLAMSE, Departure to destination country

    So..... wait and see

  106. #106
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    Quote Originally Posted by ledoman View Post
    ...gmcttr, which postal service you have got? If it was Sweeden post, then it might be routed to Santa's first as they are pretty close ...
    Thanks.

    Whatever KD's free shipping to the USA is??? Clicking on "Track It" from my Order Summary page goes to the Hongkong Post tracking page which gives me "There is no record on the subject item".

    Using 17Track leads me to believe it was shipped by Sweden Post and states "2015-11-28 14:35 Item received for processing". All is well.

  107. #107
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    Quote Originally Posted by mentawais View Post
    I ordered from kaidomain the 6 cell ,once I get and test it I'll post☺
    I ordered this also and got an email that it has been shipped. Has the battery actually been shipped or is it just BS ?

    On an unrelated note, WTF is up with all the advertising on MTBR. I dont mind a few ads, but its getting ridiculous. Over 1/2 of my screen is lost to ads now.

  108. #108
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    I'm not aware about status of 6 cell packs. Last time I've got info they are in production. They might be avalaible now. I should ask KD.

  109. #109
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    Quote Originally Posted by ledoman View Post
    I'm not aware about status of 6 cell packs. Last time I've got info they are in production. They might be avalaible now. I should ask KD.
    Is this the 6 cell version?

    http://www.kaidomain.com/product/Details.S024443

  110. #110
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    What, can't you read ? It clearly states several times there is 6x NCR18650B pack.

    BTW. Here are some answers from KD:

    Q1 : What is the staus of 2 cell pack?
    A1 : For the 2 x Battery pack, we will produce as 8.4V (2S1P), max cur: 6A. It is the same as 4x and 6x battery pack. We are seeing the pouch. We want to find a better pouch in this time.

    Q2 : Are 6 and 8 cells pack in stock now?
    A2 : 6x and 8x is in stock now.

    Q3 : How about flat 4cell (2S2P) pack?
    A3 : Yes. We can contact our manufacturer and i will reply to you asap.

  111. #111
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    Great news ledoman, thanks!!!

    For the 4 cell flat pack, there shouldn't be much of a need for a pouch, as I suspect most of us would only want such a setup to carry inside a jersey pocket. Though maybe some would want to mount to helmet, would be a bit heavy but much less awkward than lugging a 4 cell square pack up there.

  112. #112
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    Quote Originally Posted by ledoman View Post
    What, can't you read ? It clearly states several times there is 6x NCR18650B pack.

    BTW. Here are some answers from KD:

    Q1 : What is the staus of 2 cell pack?
    A1 : For the 2 x Battery pack, we will produce as 8.4V (2S1P), max cur: 6A. It is the same as 4x and 6x battery pack. We are seeing the pouch. We want to find a better pouch in this time.

    Q2 : Are 6 and 8 cells pack in stock now?
    A2 : 6x and 8x is in stock now.

    Q3 : How about flat 4cell (2S2P) pack?
    A3 : Yes. We can contact our manufacturer and i will reply to you asap.
    All good news. People who are worried about shipping and tracking...remember it is officially the Christmas holiday season. If you order it NOW you MIGHT get it by Christmas. Otherwise, most times the free shipping takes about 16-18 days to USA east coast. I've ordered many items from Kaidomain over the years and never can I remember waiting for an order longer that 18 days "unless" it was back ordered. I think that only happened once ( batteries ) and took a couple more weeks. Thankfully they sent the available items and sent the other items later.

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    Please excuse me if this is considered off-topic. I just ordered one of these packs and I was wondering what charger is recommended to get the best out of this pack? The only chargers I have on hand are the ones that come with the cheap Chinese lights. What charger would you recommend that I can use without disassembling the pack? Thank you for your response.

  114. #114
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    Use the chargers u have they will work the same.

  115. #115
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    Quote Originally Posted by UB400 View Post
    Please excuse me if this is considered off-topic. I just ordered one of these packs and I was wondering what charger is recommended to get the best out of this pack? The only chargers I have on hand are the ones that come with the cheap Chinese lights. What charger would you recommend that I can use without disassembling the pack? Thank you for your response.
    Your question is not off topic as it has to do with charging the batteries that you are ordering. Hopefully your charger will work fine. Nevertheless it doesn't hurt to have a second charger on hand if the one you have doesn't work. I would recommend ordering a brand name charger from either action led or from a mountain bike revolution.

  116. #116
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    UB400, the charger you have would be pretty slow for your pack (probably you are talking about 4 cell pack). Certainly I would check output voltage the chargers. In the other thread someone has found out he has 10.35V instead of 8.40V. If your is about 8.40V then it is more or less fine, just slow.

    Some time ago I was working to get better and faster chargers to the community but Gearbest did not decide to order them. It was only 200 pcs to make a deal, but ..
    Here is the thread about it:
    http://forums.mtbr.com/lights-night-...ks-944978.html

    I'm going to try now with Kaidomain. I think people should stay away from those cheapo chargers if they can. Specialy for 220V enviroments those are not safe enough. You can find review of one such charger here: Review of WJT-0068 2S 1A LiIon

  117. #117
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    Quote Originally Posted by Cat-man-do View Post
    People who are worried about shipping and tracking...remember it is officially the Christmas holiday season. If you order it NOW you MIGHT get it by Christmas. Otherwise, most times the free shipping takes about 16-18 days to USA east coast.
    I ordered a couple of Batteries from Hunk Lee on Nov12, they hit NuJersey on Nov25, they've been bouncing around Fedex Ground since then, just arrived at the "smartpost" depot in Sacramento today, maybe I get them tmorrow? Monday?

    It's that time of year.

  118. #118
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    Hey Ledoman

    Are you able to see if KD can supply this battery pack w/ a slightly bit different connector that would work w/ a Dinotte for those of us that have those lights. I've emailed them and they responded once but once they got the photos of what I needed, they seem to have disappeared leading me to believe this is the only connector they'll offer.

    Thx

    MB

  119. #119
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    KD I dont think is actually making the pack, they have a company that does. If standard ms connectors dont work for dinotte then your stuck with dinotte packs. Problem of proprietary parts, in this case the connector.

  120. #120
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    Quote Originally Posted by ledoman View Post
    Some time ago I was working to get better and faster chargers to the community but Gearbest did not decide to order them. It was only 200 pcs to make a deal, but ..
    Here is the thread about it:
    http://forums.mtbr.com/lights-night-...ks-944978.html

    I'm going to try now with Kaidomain. I think people should stay away from those cheapo chargers if they can. Specialy for 220V enviroments those are not safe enough. You can find review of one such charger here: Review of WJT-0068 2S 1A LiIon
    If you get anywhere with KD on making better chargers: I want 2.

    hopefully there will be enough demand.

  121. #121
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    Quote Originally Posted by mb323323 View Post
    Hey Ledoman

    Are you able to see if KD can supply this battery pack w/ a slightly bit different connector that would work w/ a Dinotte for those of us that have those lights. I've emailed them and they responded once but once they got the photos of what I needed, they seem to have disappeared leading me to believe this is the only connector they'll offer.

    Thx

    MB
    Have you thought about swapping out the light head connector for an MS one? Might be easier since heads are typically not sealed like the packs are.

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    Thank you all for your responses to my question. Thank you Ledoman for the link to the charger feeler thread, I too am interested.

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    UB400, will try to work on chargers to, but can't give any prommises yet.

    GOOD NEWS:

    2 cell (2S1P) battery packs are in the production. Currently they don't have apropriate pouch for it, but they are working on it. The PCM used should stand 10A continious current. Since the cells are supposed to be NCR18650GA this is good so also more powerful lights can be used too. But of course we need to check it out first.

    4 cell FLAT (2S2P) packs are also in the production. I don't have any exact data on this one yet, waiting to get some pictures tomorrow.

  124. #124
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    Flat 4 cell sounds great! Thx and keep us posted pls.

  125. #125
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    Wow I can hardly believe it ledoman, am so thrilled!

    Once the 2S2P becomes available, will need to find a double pocket jersey or vest to keep the packs "balanced."

    Thanks again and again.

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    Andy, keep comm. I haven't seen it yet. This is just the info I've got from KD. Will see it today if they are going to send me the pictures as prommised. Don't know anything about the prices either. But so far they have been reliable, so keep fingers crossed

  127. #127
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    This flat 4 cell has my attention. Something I can put in the top pocket of my hydropack for nights ill be out more than an hour or so.

  128. #128
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    OK here we go. Preview of 2 cell (2S1P) and 4 cell (2S2P) flat packs. Pictures have been sent to me by Kaidomain.
    Quality 8.4V 6800mAh 4 x NCR18650B Battery Pack at Kaidomain.com for reasonable price-2xbatterypack-draft.jpg
    Quality 8.4V 6800mAh 4 x NCR18650B Battery Pack at Kaidomain.com for reasonable price-4xbatterypack-draft.jpg

    The pouch for the 2 cell pack is in the production now. I have no idea how it looks like.

    Question: Would you rather see shorter cable with 2 cell pack? Currently it is 60cm long, same as with 4 cells. If yes, how long it should be?

  129. #129
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    Yes, shorter cable for 2S1P pack. 15cm should be plenty.
    You can always add an extension, which they sell.

  130. #130
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    Ofroad, be aware you get some additional voltage drop over the connectors if you choose to use extension cable. Just to remind you...

  131. #131
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    For the 2 cell. 10cm max for the length. Anything longer and your going to have alot of extra cable hanging on your helmet.

  132. #132
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    Has anyone actually received the 6800 battery pack?

  133. #133
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    I would say 15cm is Long enough for the 2s1p pack - to much cable on the helmet / head is not so comfortable!
    ..just ride...

  134. #134
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    I say 5-10cm length for the 2s1p pack, most guys will be using these on the helmets, my current 2s1p packs have 2-3cm cable length!

  135. #135
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    I say 10-15cm for 2-cell

  136. #136
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    Ya anything longer than 10 is way too much, id prefer 5cm. If people are needing longer, use extension cable

  137. #137
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    ledoman, might KD arrange some kind of protective covering on the flat four? I understand that there is probably not any rubber casing being manufactured for such a configuration as of now but I'd be uncomfortable riding around with cells in my pockets merely held together with some measly shrink wrap. Otherwise would have bought hunk_lee's 2S2P flat pack. Oh well their 2S1P looks good. Thanks again!

  138. #138
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    on my other cheapo battery packs I wrapped them liberally with Self-fusing Silicone Tape, seems to really firm up the package and makes it waterproof. Haven't tried it on a flat pack....

    Quote Originally Posted by andychrist View Post
    ledoman, might KD arrange some kind of protective covering on the flat four? I understand that there is probably not any rubber casing being manufactured for such a configuration as of now but I'd be uncomfortable riding around with cells in my pockets merely held together with some measly shrink wrap. Otherwise would have bought hunk_lee's 2S2P flat pack. Oh well their 2S1P looks good. Thanks again!

  139. #139
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    Quote Originally Posted by andychrist View Post
    ledoman, might KD arrange some kind of protective covering on the flat four? I understand that there is probably not any rubber casing being manufactured for such a configuration as of now but I'd be uncomfortable riding around with cells in my pockets merely held together with some measly shrink wrap. Otherwise would have bought hunk_lee's 2S2P flat pack. Oh well their 2S1P looks good. Thanks again!
    Andy, I've got just pictures of the samples. I'm shure they would try to find/make some kind of pouch. Their statement wasn't really clear if they are looking for pouch for 2cells pack or for both. Anyway, I will ask tem.

    For all others. It looks 10cm cable for 2cell pack is the most common to all you have answered. I will forward this to the KD. Then we will see. There might be first batch with longer cables (I'm supposed to get one to test, but it's not shipped yet). If so, I'll ask them to publish both versions on their web pages so you'll have the choice.

  140. #140
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    Thanks ledoman.

    Quote Originally Posted by patski View Post
    on my other cheapo battery packs I wrapped them liberally with Self-fusing Silicone Tape, seems to really firm up the package and makes it waterproof. Haven't tried it on a flat pack....
    Good idea; also maybe it would help to stiffen a flat pack with some kind of thin plastic/polycarbonate sheet material like Ortlieb uses in the backsides of their panniers.

  141. #141
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    Quote Originally Posted by the mayor View Post
    Has anyone actually received the 6800 battery pack?
    Nope. Ordered 11/28, "shipped" 12/1, however, still no update when I track it via the data on kaidomain website. I figured it would take 3-4 weeks, so I won't worry until the new year.

  142. #142
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    Quote Originally Posted by jn35646 View Post
    ...still no update when I track it via the data on kaidomain website. ...
    Try using 17track....ALL-IN-ONE PACKAGE TRACKING | 17TRACK

  143. #143
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    Quote Originally Posted by gmcttr View Post
    Neat website. No luck though. I've sent a note to Kaidomain. Not worried yet, expected it to take a while. Curious if others that ordered in the same time frame are seeing tracking results or receiving their orders.

  144. #144
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    I placed my order on the 27th....a postage ticket was made on the 28th.
    It finally shows "package entered system" in Swedish Postal today.

  145. #145
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    Ordered 11-20-15

    Order shipped email on 11-24-15

    KD/Hongkong Post tracking still says "There is no record on the subject item."

    17Track shows...

    In Transit ...Sweden(Direct Link)...United States(USPS)

    Latest Event -- 2015-12-04 13:34 Order departed on flight from origin

    2015-12-04 13:34 Order departed on flight from origin
    2015-11-28 14:35 Item received for processing
    2015-11-28 09:41 Item pre-advice received

  146. #146
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    I add a wrap of heat-shrink tubing for rigidity.
    If it's a LiPo soft pack I do 2 wraps -1 vertical, 1 horizontal.
    If you want to get really fancy you can double-seal it by painting plasti-dip on the exposed edges.

    Quote Originally Posted by andychrist View Post
    Thanks ledoman.



    Good idea; also maybe it would help to stiffen a flat pack with some kind of thin plastic/polycarbonate sheet material like Ortlieb uses in the backsides of their panniers.

  147. #147
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    Quote Originally Posted by gmcttr View Post
    I contacted kaidomain since the tracking they provided on order did not work. Kaidomain provided the following link for tracking that worked:

    Track and trace

    Not sure the link will work for you as I removed my tracking #. Contact kaidomain with transaction # and they will reply quickly

  148. #148
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    They replied quickly to me as well with this tracking service. Meant to share, thanks for doing so.

    Sent from my SCH-I545 using Tapatalk

  149. #149
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    I am curious. Which of these packs are safe to use with the gearbest yinding NW light?

  150. #150
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    Both, as long as the pack is listed 8.4v, it will work with yinding and most of budget bike lights. These are the best budget packs available at this time.

  151. #151
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    Great thanks. I ordered a yinding NW just now because the light/battery combo is out of stock. I actually have a battery pck for a magicshine knockoff that looks EXACTLY like this pack and the Panasonic pack on gearbest. I wonder if that would be safe to use. Regardless, I have to buy a new pack soon because my old light is going to the lady.


    Sent from my iPhone using Tapatalk

  152. #152
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    No reason it wont except the run time will be pretty low, the cheap packs like that many time dont run a light for very long, especially newer, higher output lights.

  153. #153
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    Mine finally showed up. Testing it out on my Yinding and it was still green after 2 hours on high, at which point I gave up the test. I'm happy, I was hoping for at least 2 hours for my handlebar light and now I have it, plus it was really cheap.

  154. #154
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    wetpaint, Yinding should run another 1.5 hour on high with this battery pack. All together 3.5h. Combined usage should give you 5h of runtime.

  155. #155
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    Quote Originally Posted by ledoman View Post
    For all others. It looks 10cm cable for 2cell pack is the most common to all you have answered. I will forward this to the KD. Then we will see. There might be first batch with longer cables (I'm supposed to get one to test, but it's not shipped yet). If so, I'll ask them to publish both versions on their web pages so you'll have the choice.
    Ledoman do you know if they will use our wish for the 10cm cable length?
    When will we see them in stock?
    As i see the 2x packs with 60cm cable are available now!
    Thanks

    Edit: today arrived my 4x18650 packs from KD - Ordered on 1st of Dec. !
    ..just ride...

  156. #156
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    I see... I was waiting for KD to publish packs at their site. They will offer both 60 and 10cm 2S1P versions.

    Currently I can see only 60 cm version but I expect to get links for 10cm 2S1P and for 4 cell flat pack soon.

    I'm glad you have got 4cell pack. You won't regret it.

  157. #157
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    ok - great thanks!
    So i will wait for the 10cm cable Version 2s1p pack to Show up!
    ..just ride...

  158. #158
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    Hmmm.....the listing says 60 MM.
    I hope that's a misprint. LOL

  159. #159
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    It looks they have corrected it already

  160. #160
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    Quote Originally Posted by ledoman View Post
    It looks they have corrected it already
    Look in the picture...still 60mm.

  161. #161
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    Quote Originally Posted by the mayor View Post
    Look in the picture...still 60mm.
    Nope: http://kaidomain.com/product/details.S024751
    ..just ride...

  162. #162
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    Quote Originally Posted by Whitedog1 View Post
    That's the 10cm

  163. #163
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    Quote Originally Posted by Whitedog1 View Post
    Ledoman do you know if they will use our wish for the 10cm cable length?
    When will we see them in stock?
    As i see the 2x packs with 60cm cable are available now!
    Thanks

    Edit: today arrived my 4x18650 packs from KD - Ordered on 1st of Dec. !
    But this 2x packs are 7,4 v ,can I used it with BT21??Which one charger can I used?

  164. #164
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    Quote Originally Posted by the mayor View Post
    That's the 10cm
    yes there are 2 Versions - one with 10cm and one with 60cm cable!
    ..just ride...

  165. #165
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    Quote Originally Posted by Whitedog1 View Post
    yes there are 2 Versions - one with 10cm and one with 60cm cable!
    You need to go back and read this thread.

  166. #166
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    Quote Originally Posted by mentawais View Post
    But this 2x packs are 7,4 v ,can I used it with BT21??Which one charger can I used?
    7,4v is nominal voltage, max voltage is 8,4V - so i think you can use the normal charger which Comes with the BT21 light!
    ..just ride...

  167. #167
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    Quote Originally Posted by mentawais View Post
    But this 2x packs are 7,4 v ,can I used it with BT21??Which one charger can I used?

    Same charger, all the same lights. They are the EXACT SAME PACKS, 7.4 and 8.4v packs are the exact same thing. 7.4 is nominal and 8.4v is max/fully charged voltage.

  168. #168
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    Quote Originally Posted by the mayor View Post
    You need to go back and read this thread.
    please enlighten me!??
    ..just ride...

  169. #169
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    OK, so you have already noticed it. Let me resume. We got two versions of 2S1P pack with:

    10 cm cable: http://kaidomain.com/product/details.S024751
    60 cm cable: http://kaidomain.com/product/details.S024746

    I'll be getting the one with 60cm to test and no pouch since it was not ready back then. Unfortunately the shippment is still in HK.

  170. #170
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    I already ordered the 10cm Version - current Status is "packing"!
    ..just ride...

  171. #171
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    There was some discussion about charging NCR18650GA cells in another thread.
    Just some important facts FYI:

    Tipical recommended charge rate 1.675A/cell (0.5C)
    The charging current should not exceed 3.35A/cell (1C)

    Source: http://www.nkon.nl/sk/k/ncr18650ga.pdf
    Another interesting datasheet: https://www.master-instruments.com.a...t_file/63606/1

    So it is still safe to charge those cells up to 3A or in another words you can safely charge this KD 2S1P pack at that rate, but for longer life time it is recommended 1.6A. So when in hurry you can safely use 3A, but otherwise it is recommended to use less.

  172. #172
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    Received four cell pack on Saturday, ordered Nov 11. Arrived fully charged. Ordered 2 cell, 10cm yesterday

  173. #173
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    It should not be fully charged on arrival. Have you measured voltage or just watched the status leds on some light?

  174. #174
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    Charger has a red/green light indicating charging. Plugged it in, light green, stayed green.

  175. #175
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    As long as you don't measure the voltage of the pack I can't say for shure. Normaly cells should be at storage voltage when arrived (ie. about 3.7 - 3.8V per cell or 7.4-7.6V with 2S pack). It might be they have tested it before shipping, but as said can't be shure if you don't measure the actual voltage.
    Anyway, don't store it fully charged for a longer period.

  176. #176
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    FWIW...my three 4 cell packs arrived today and all three measured 7.22V

  177. #177
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    My 4 cell arrived today, looks great, and I got a hand written christmas card from Kai. Unfortunately I've loaned out my charger so no reliable runtime testing.
    Just ordered a two cell.

  178. #178
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    Today I've just got 2S1P and 2S2P flat pack to test. No 2 cell pouch included as it was not ready at shipping time. Had some issues with customs for the first time when getting things by DHL, but solved that.

    You can expect my review in a few days. First will test 2 cell pack which is probably the most interesting. Very likely I'll open new thread since this one is already pretty long.

  179. #179
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    4 cell (2S2P) FLAT pack published:
    http://www.kaidomain.com/product/details.S024761

    So far all you wishes come true (maybe Santa chimed in ) Now it's time to work on a good charger(s).
    Last edited by ledoman; 12-28-2015 at 10:36 AM.

  180. #180
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    Awesome work ledoman! I am still waiting on a good higher current charger. Yes I have a hobby charger, but sometimes I don't want to drag that out.

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  181. #181
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    Yeah I know. My first attempt associated with GB failed. Now I'll try to engage Kaidomain, but again it will take some time as I'm not shure if we can get same manufacturer products which were already tested.
    I'm in contact with some other, but they are asking if the charger could be desktop not the wall plug since it's hard to get 3A out of small housing. Personaly I would prefer wall plug design.

    Anyway this should be discussed over there at http://forums.mtbr.com/lights-night-...ks-944978.html

  182. #182
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    I know 2A chargers already exist, nitefighter lights have them.

    Im good with 2A. Anything else causes to much risk of damage to cells and may not be a good idea to post all about "faster charging" as we'll get idiots burning their houses down trying to charge a cheap Chinese pack at 3A

  183. #183
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    Quote Originally Posted by ledoman View Post
    4 cell (2s2p) flat pack published:
    http://www.kaidomain.com/product/details.s024761
    udaman

  184. #184
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    ???

  185. #185
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    American "slang" term (I use it a lot too, just not here lol):

    U DA MAN -->. Your the man.

  186. #186
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    Sorry, but we are not all American so we can't understand you. Thanks Tig. In general I've got feeling sometimes for someone the USA is "the whole world", specialy when giving advices where to get something not thinking members can be from anywhere on the planet. I miss that data below member name on the left side of our posts. Sometimes it would be much easier to discuss.

  187. #187
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    Oops wrong thread.

  188. #188
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    What are the terminals labeled P- P+ and T?
    Can we get the pack with a balance tap fitted?

    Is it possible to buy the rubber case and pouch separately?

  189. #189
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    Don't know for T, but P-/P+ terminals are for Power (ie cable). Those terminals are on the both sides. I can imagine T is for testing purposes, but can't tell for shure.

    I don't think many users would like to have balancing tap on their packs. IMHO, they would rather stay with rainproof design. I think it's not hard to solder tap by yourself anyway.

    I don't know about rubber case and pouch, but you can ask yourself at [email protected].

  190. #190
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    Typically "T" is used for thermal sensor connection...

  191. #191
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    Archie, do you think the IC's on that PCM has thermal feature implemented? I would try to trace it down, but I've already sealed the whole pack back.

  192. #192
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    I've found the opinion of the radio controlled community that the exposed connectors of a balance tap don't add much in the way of reducing the weather resistance of a pack. They seem to think it only matters if the terminal is submerged.

    I know it's easy to add a tap, I've done it to my own packs. I'm just looking for a nicer solution.
    And my modified packs are cheap packs that came with my lights, testing before I buy a good quality pack.

  193. #193
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    Well RC community doesn't wear batteries on their helmets, backpacks, bicycles, .... If they run into problem their toys would be damaged not themselves, so useless advice, imho.

  194. #194
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    They have been using LiPo for a lot longer than us bikers have been. You don't hear about hobbyists burning their houses down, and just tucking the lead inside the pouch would give it sufficient protection from the weather anyway.

    Being able to safely charge and monitor a pack is more important to me than the highly unlikely scenario that enough water will reach the plug to cause an issue.

  195. #195
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    I agree, but you are very likely not an average user and you know what are you doing. An average user doesn't care to much, so we need simple design. You have to think about most users not just yourself.

  196. #196
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    That is a fair point. I see that Hunk_Lee on ebay sells PCB's that look like a direct replacement for the standard board inside one of these packs and gives it balance features using the standard charger. I may investigate this route instead

  197. #197
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    Quote Originally Posted by ledoman View Post
    Archie, do you think the IC's on that PCM has thermal feature implemented? I would try to trace it down, but I've already sealed the whole pack back.
    Very unlikely. But many of bike lights PCBs I've seen were 'ready' for that feature, with soldering points for NTC resistor and places for related components (left unpopulated at the factory)...

  198. #198
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    Quote Originally Posted by soopahfly View Post
    They have been using LiPo for a lot longer than us bikers have been. You don't hear about hobbyists burning their houses down, and just tucking the lead inside the pouch would give it sufficient protection from the weather anyway.





    Being able to safely charge and monitor a pack is more important to me than the highly unlikely scenario that enough water will reach the plug to cause an issue.


    If you haven't heard of rc packs burning things down you obviously haven't been that involved in rc and lipo use. I was there when lipos and brushless first became big. Saw first hand lipos go critical, videos all over YouTube, threads just like the one hear of ppls garages being gutted or their kitchen catching on fire. And these have nothing on the destructive force of lipos.



    Lipos dont have protection circuits(at least didn't) because its added resistance against the massive amp draws. 3-4x that of these bike lights easily. So a balance plug is required.



    Also rc users are a hell of alot smarter/have more common sense than many cyclists. So companies have to compensate for the high level of stupidity.

    Balance is something that's nice to have but as said before, properly prebalanced cells last a long time before falling out of balance again. To me its just as easy to use a balance charger by opening the pack.

    Oh and its not the plug getting wet that's a problem, its water getting inside the pack and shorting out the pcb/cells that's the problem. Can submerge connectors all you want, wont hurt anything. Just like a lipo, water gets inside the cells, its over in a very exo-thermic way.

  199. #199
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    Quote Originally Posted by ledoman View Post
    In general I've got feeling sometimes for someone the USA is "the whole world"
    I just assumed you had spent enough time on MTBR...

    I drove through Ljubjana once, on the way to Torbole(via Trieste) for Gardasee mountain biking, '92 I think, wild times.

    Quote Originally Posted by tigris99 View Post
    U DA MAN -->. Your the man.

    and it's "You're the man!"
    Last edited by patski; 12-30-2015 at 08:43 PM.

  200. #200
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    Quote Originally Posted by soopahfly View Post
    They have been using LiPo for a lot longer than us bikers have been. You don't hear about hobbyists burning their houses down...
    Actually, if you're in the loop, they catch fire all the time, when my son was into quadcopters we made him charge them in the fireplace and bought him an ammo box to store them.

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