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  1. #151
    Kir
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    Measured 2 cells so far, 1100 and 1150mAh at 1A discharge to 3V.
    4 x 18650 Battery Set for Bicycle Light-in Charger from Consumer Electronics on Aliexpress.com - i bought it from ali and they actually specify "2400mAh" capacity, so it was expected
    Still a good holder though, just don't forget to replace the cells.

  2. #152
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    thanks, for the info and the find on aliexpress!!
    ..just ride...

  3. #153
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    I bought the Panasonic 3400mAh batteries off Fasttech and they did NOT fit into the Kaidomain holder....I tried many times and eventually had to reinsulate them as the shrinkwrapped plastic had torn off in places. I also removed any sharp edges on the thread channels of the battery holder. The balancing wire also came off it's soldered end.
    This project has been a failure for me, wish I had known that these expensive batteries would not fit before I bought them....

    Fasttech is certainly a reliable reseller.

    Thanks to Kir for all the useful info posted!!!
    Goatman
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  4. #154
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    The Battery Thread: 2013

    That sucks - thanks for sharing this information. So they came with a larger diameter than typical cells?

  5. #155
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    The cells that were already in this battery holder fitted fine.
    The new Panasonic 3400mAh ones did not fit.
    Goatman
    - It's not the destination that counts but how you get there -

  6. #156
    Kir
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    NCR18650B have 18.4-18.6mm diameter, so they're just a bit over the spec.
    But they DO fit in kaidomain holder, here is a pic:

    You have to carefully insert them as there is very little space on the sides, but they do fit nicely.
    And you have to use only original panasonic flat top cells! Protected ones will be too long, button-top ones will have second layer of shrink tube and will be too wide to insert into the holder.

  7. #157
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    Good job!

    Thanks for the photo Kir, those are the exact same Panasonic batteries I tried to fit.
    I should have been more careful....
    Agree, must be flat top to fit too.
    Might just order some narrower diameter cheaper 18650's and try again!
    Fasttech does list the diameters of cells and the 3400mAh Panasonic's are the widest.
    Goatman
    - It's not the destination that counts but how you get there -

  8. #158
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    The Battery Thread: 2013

    Thanks for all this very useful information Kir - I am planning to do the same upgrade after I receive my new light and hope to have more luck than goatman.

  9. #159
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    confirmed - NCR18650B do fit nicely! I also have them in the holder!
    ..just ride...

  10. #160
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    Good news Whitedog I think I should have been more careful during the fitting process!
    Have ordered some 2900mAh narrower diameter Panasonics off Fasttech that I will fit instead...
    Goatman
    - It's not the destination that counts but how you get there -

  11. #161
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    Hi
    I am having a few question regarding this yellow aluminum battery holder sold on Aliexpress. When asking the seller about the battery size, the seller told be the batteries cannot be removed? Is it true? Does someone ordered it from this website?
    However it is possible to change the batteries, does 18.4x69mm batteries fit in this holder?

  12. #162
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    Quote Originally Posted by Kir View Post
    NCR18650B have 18.4-18.6mm diameter, so they're just a bit over the spec.
    But they DO fit in kaidomain holder, here is a pic:

    You have to carefully insert them as there is very little space on the sides, but they do fit nicely.
    And you have to use only original panasonic flat top cells! Protected ones will be too long, button-top ones will have second layer of shrink tube and will be too wide to insert into the holder.
    Hi Kir,
    nice combination! I plan a similar setup when i receive my light. Which kind of charger do you use for those pricey batteries?

  13. #163
    Kir
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    I use Imax B6 for all my li-ion batteries, but you can use any charger like the standart chinese chargers for these lights - usually they work fine.

  14. #164
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    I know this has been asked before but where can I get 18650 Panasonics and feel comfortable they are the real thing.

    Thx

  15. #165
    Kir
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    Fasttech.com, search for "panasonic 18650"

  16. #166
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    Has anyone tried using only two batteries in this? Making it a 2S1P.
    "By Your Command"

  17. #167
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    Quote Originally Posted by Kir View Post
    I use Imax B6 for all my li-ion batteries, but you can use any charger like the standart chinese chargers for these lights - usually they work fine.
    Thanks for the infos! So there should be no danger of burning, melting or exploding batteries with the standard chinese charger? ;-)

    In a earlier post you mentioned to add a balance lead to this battery pack. I´m a totally noob on this topic... how can I make this?

  18. #168
    Kir
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    Quote Originally Posted by pucked up View Post
    Has anyone tried using only two batteries in this? Making it a 2S1P.
    It will work, but why do you want to do this?

    Quote Originally Posted by tish! View Post
    Thanks for the infos! So there should be no danger of burning, melting or exploding batteries with the standard chinese charger? ;-)
    In a earlier post you mentioned to add a balance lead to this battery pack. I´m a totally noob on this topic... how can I make this?
    No, the worst thing that could happed is overcharging of cells if you leave it connected to the charger for a long time - but protection PCB in the battery pack should prevent it. Still you should disconnect it from charger when its finished charging (green led lights up on charger), don't leave it connected.

    Balance lead will look like this (another battery pack with NCR18650Bs that I made for my friend):

    You have to solder it inside the battery pack to the protection pcb and cut a small hole in the plastic to route the wires. I can make a picture that shows where you have to solder the wires, but you'll need some soldering skills for this - points are tiny

  19. #169
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    Balancing charge is not required too often: in my practice, the battery comes out of balance after ~1 - 1.5 year of use. As for the holder mentioned above - I don't see any point drilling it to add balance leads: it it not a battery pack but just a holder, and IMHO it's more logical to periodically charge the cells in common 4-slot (or 2-slot) charger...

  20. #170
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    Quote Originally Posted by Kir View Post
    It will work, but why do you want to do this?
    I have more lights than batteries and sometimes when out on a group ride I would split the batteries up into two's so that new riders can come along. This way it saves me from buying 2S1P holders. I tend to buy only 2S2P holders from fasttech w/PCB which can be used as a 2S1P. Even with only 2 Panasoncis 3400am I can still get over 3hrs run times on high with the lights I've made.
    "By Your Command"

  21. #171
    Kir
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    Quote Originally Posted by -Archie- View Post
    Balancing charge is not required too often: in my practice, the battery comes out of balance after ~1 - 1.5 year of use. As for the holder mentioned above - I don't see any point drilling it to add balance leads: it it not a battery pack but just a holder, and IMHO it's more logical to periodically charge the cells in common 4-slot (or 2-slot) charger...
    Problem is - this pack is not made for constant opening. Soft aluminium profile and steel screws don't mix very well, threads in central part will be stripped very fast.
    And besides balance lead is very useful on its own. I use it to quickly check remaining battery capacity with this and simular checkers:
    HobbyKing Daily - HobbyKing Cellmeter - YouTube

    And btw here is another very interesting battery case:
    Solarstorm portable water proof 4*18650 battery box rechargeable battery case used for bike light-in Other Batteries from Electrical Equipment & Supplies on Aliexpress.com
    I don't think that it was mentioned on this forum yet. Its pretty simular to Fenix BT20's case, but made for 4 batteries and looks sturdy enough. I ordered 2 of them for testing.

  22. #172
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    Quote Originally Posted by Kir View Post
    Problem is - this pack is not made for constant opening. Soft aluminium profile and steel screws don't mix very well, threads in central part will be stripped very fast.
    Well, that's make sense...

  23. #173
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    No, the worst thing that could happed is overcharging of cells if you leave it connected to the charger for a long time - but protection PCB in the battery pack should prevent it. Still you should disconnect it from charger when its finished charging (green led lights up on charger), don't leave it connected.

    You have to solder it inside the battery pack to the protection pcb and cut a small hole in the plastic to route the wires. I can make a picture that shows where you have to solder the wires, but you'll need some soldering skills for this - points are tiny
    Thanks! For the beginning I'll stay with the original battery holder and always have a look at the green light of the charger ;-)

    BTW: Very nice battery holder to which you refer. Maybe I'll order me one as well...
    Last edited by tish!; 09-18-2013 at 02:09 PM. Reason: wrong quotation

  24. #174
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    Quote Originally Posted by Kir View Post
    And btw here is another very interesting battery case:
    Solarstorm portable water proof 4*18650 battery box rechargeable battery case used for bike light-in Other Batteries from Electrical Equipment & Supplies on Aliexpress.com
    I don't think that it was mentioned on this forum yet. Its pretty simular to Fenix BT20's case, but made for 4 batteries and looks sturdy enough. I ordered 2 of them for testing.
    Nice find Kir!!
    Have some update too - found the alu holders in different colour and cheper Price:
    too bad that all of these alu holders are not magicshine compatible!!
    - High Quality blue color Rechargeable 8.4v 4*18650 4400 mAh battery pack for solarstorm X2 bicycle bike light of battery set-in Rechargeable Batteries from Electrical Equipment & Supplies on Aliexpress.com
    - High Quality Rechargeable 8.4v 4*18650 4400 mAh bicycle light battery pack for solarstorm X2 bike light of battery set-in Rechargeable Batteries from Electrical Equipment & Supplies on Aliexpress.com

    Magicshine compatible:
    - waterproof rechargeable 8.4v 4*18650 5200 mAh battery pack for bicycle liahg bike light,headlamp,headlight of battery set-in Rechargeable Batteries from Electrical Equipment & Supplies on Aliexpress.com
    - waterproof 6400mAh 4*18650 8.4V Rechargeable 18650 Battery Pack for Bicyle Light with Magic protection bag+free shipping-in Rechargeable Batteries from Electrical Equipment & Supplies on Aliexpress.com

    They have a nice claimed capacity - but this should be tested.....

    Kaidomain has the black holder as well now:
    - http://kaidomain.com/product/details.S022419
    ..just ride...

  25. #175
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    Quote Originally Posted by Kir View Post
    ...And btw here is another very interesting battery case:
    Solarstorm portable water proof 4*18650 battery box rechargeable battery case used for bike light-in Other Batteries from Electrical Equipment & Supplies on Aliexpress.com
    I don't think that it was mentioned on this forum yet. Its pretty simular to Fenix BT20's case, but made for 4 batteries and looks sturdy enough. I ordered 2 of them for testing.
    Nice find Kir. I like the look of this one. I'd get one but I'd like to use paypal. Since I'm in no hurry I might have to wait till someone else is doing the selling.

    If anyone out there sees another vendor selling these with the paypal option please post up.
    Last edited by Cat-man-do; 09-19-2013 at 12:44 PM.

  26. #176
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    Quote Originally Posted by Kir View Post
    And btw here is another very interesting battery case:
    Solarstorm portable water proof 4*18650 battery box rechargeable battery case used for bike light-in Other Batteries from Electrical Equipment & Supplies on Aliexpress.com
    I don't think that it was mentioned on this forum yet. Its pretty simular to Fenix BT20's case, but made for 4 batteries and looks sturdy enough. I ordered 2 of them for testing.
    Wow shipping kills this deal for me. $15 to ship? I like the case and willing to try it but will wait until another vendor sells them with better or free shipping.
    "By Your Command"

  27. #177
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    Quote Originally Posted by pucked up View Post
    Wow shipping kills this deal for me. $15 to ship? I like the case and willing to try it but will wait until another vendor sells them with better or free shipping.
    Actually the price isn't bad. The other places just include the shipping with the listed price. If you really want one badly and don't mind dealing with the credit card info I suggest you go for it. Just don't expect to get it real fast.

  28. #178
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    Quote Originally Posted by Cat-man-do View Post
    Actually the price isn't bad. The other places just include the shipping with the listed price. If you really want one badly and don't mind dealing with the credit card info I suggest you go for it. Just don't expect to get it real fast.
    Will this battery holder take the longer protected decent batteries i.e. around 69 mm. I need longer battery life for my ssx2

  29. #179
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    Quote Originally Posted by Scoobylight View Post
    Will this battery holder take the longer protected decent batteries i.e. around 69 mm. I need longer battery life for my ssx2
    Why would you want to use "protected" batteries? They are not designed nor intended to work in this configuration - that is the why they have a different PCB for 2sXp packs.

  30. #180
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    Quote Originally Posted by Scoobylight View Post
    Will this battery holder take the longer protected decent batteries i.e. around 69 mm. I need longer battery life for my ssx2
    the holder has already a pcb istalled to protect the batteries!
    So you should use unprotected 18650 cells - longest runntime you will get with panasonic ncr18650b-3400mAh!
    ..just ride...

  31. #181
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    Quote Originally Posted by Scoobylight View Post
    Will this battery holder take the longer protected decent batteries i.e. around 69 mm. I need longer battery life for my ssx2
    longer batteries don't give you longer runntime
    but newer chemistry or lately released batteries will
    ..just ride...

  32. #182
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    Quote Originally Posted by Kir View Post
    Problem is - this pack is not made for constant opening. Soft aluminium profile and steel screws don't mix very well, threads in central part will be stripped very fast.
    And besides balance lead is very useful on its own. I use it to quickly check remaining battery capacity with this and simular checkers:
    HobbyKing Daily - HobbyKing Cellmeter - YouTube

    And btw here is another very interesting battery case:
    Solarstorm portable water proof 4*18650 battery box rechargeable battery case used for bike light-in Other Batteries from Electrical Equipment & Supplies on Aliexpress.com
    I don't think that it was mentioned on this forum yet. Its pretty simular to Fenix BT20's case, but made for 4 batteries and looks sturdy enough. I ordered 2 of them for testing.
    Kir,

    have you noticed that the case you mentioned has a picture of a triple led Solastorm.... maybe its the standard case that comes with that light.... should be a great one to mod the side leds optics for flood and leave the center one for throw... Dont you think? Similar set up you use with your singfire but ina much smaller form factor.

  33. #183
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    Quote Originally Posted by Kir View Post
    And btw here is another very interesting battery case:
    Solarstorm portable water proof 4*18650 battery box rechargeable battery case used for bike light-in Other Batteries from Electrical Equipment & Supplies on Aliexpress.com
    I don't think that it was mentioned on this forum yet. Its pretty simular to Fenix BT20's case, but made for 4 batteries and looks sturdy enough. I ordered 2 of them for testing.
    Very cool! Has anyone seen a 2-cell version of this (like the Fenix BA4C case that comes with the BT20)? As far as I can tell, no one sells the BT20 case separately.

  34. #184
    Kir
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    Quote Originally Posted by Lichitisky View Post
    Kir,

    have you noticed that the case you mentioned has a picture of a triple led Solastorm.... maybe its the standard case that comes with that light.... should be a great one to mod the side leds optics for flood and leave the center one for throw... Dont you think? Similar set up you use with your singfire but ina much smaller form factor.
    Yes, its a case for SolarStorm X3. I actually noticed the SSX3 and posted link to it on another forum, then some guys from this forum asked seller to make separate listing for battery case only.
    I ordered 2 cases and will post impressions here when I'll receive them.

    SSX3 could work as flood-throw combo if you'll replace optics in side leds, but imo this is a better choice:
    1Set Cree XML T6+2xCree XPE R2 LED Bicycle Light 4 Mode 1200 Lumens Rechargeable intelligent Power Indicate LED Bike HeadLights-in Bicycle Light from Sports & Entertainment on Aliexpress.com
    Clone of niteye B30, TIR lenses on the sides for floor and reflector in center for throw, nice optional remote control. Expect kinda crappy battery though, but still worth it for $70.
    The only bad thing about it is XP-E leds on the sides, but it should be possible to replace them with XM-L.

  35. #185
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    Quote Originally Posted by Kir View Post
    Yes, its a case for SolarStorm X3. I actually noticed the SSX3 and posted link to it on another forum, then some guys from this forum asked seller to make separate listing for battery case only.
    Is there a link to this? Or is it the same one from Ali Express?
    "By Your Command"

  36. #186
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    Quote Originally Posted by Kir View Post
    Yes, its a case for SolarStorm X3. I actually noticed the SSX3 and posted link to it on another forum, then some guys from this forum asked seller to make separate listing for battery case only.
    I ordered 2 cases and will post impressions here when I'll receive them.

    SSX3 could work as flood-throw combo if you'll replace optics in side leds, but imo this is a better choice:
    1Set Cree XML T6+2xCree XPE R2 LED Bicycle Light 4 Mode 1200 Lumens Rechargeable intelligent Power Indicate LED Bike HeadLights-in Bicycle Light from Sports & Entertainment on Aliexpress.com
    Clone of niteye B30, TIR lenses on the sides for floor and reflector in center for throw, nice optional remote control. Expect kinda crappy battery though, but still worth it for $70.
    The only bad thing about it is XP-E leds on the sides, but it should be possible to replace them with XM-L.
    OMG that looks nice!

    The build quality looks great but, one thing turns me down right away: the leds.

    This lamp uses a not so efficient XML t6 and even worse, 2 XPE R2. Would this bring down the lumens count when compared, for example, with the SSx3 or Nitefire HERO2?

    Another thing is.... the mount. The famous brands that uses this type os mount are known to be great. But the "Chinos" version... not so good.

    Do own or have taken a look at this lamp? Is it good, quality wise? How do you think iT would compare to SSx3 and Nitefire HERO2 regarding to power output and overall quality?

    From what you have seen what is the best, cost efective light for the BARS (not using any headlamp with along with it), with 2, 3 and 4 leds?

    Catman Could answers this last one for me as well?

  37. #187
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    You guys think this would be great battery holder or the USB plug would be a problem? The screw looks solid in this... better than the one we saw in Kaidomain?!?!

    TrustFire 4000mAh 4 x 18650 Battery Power Bank w / USB Output + EUA Plug Power Adapter - Frete Grátis - DealExtreme

  38. #188
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    Quote Originally Posted by Lichitisky View Post
    This lamp uses a not so efficient XML t6 and even worse, 2 XPE R2. Would this bring down the lumens count when compared, for example, with the SSx3 or Nitefire HERO2?

    Another thing is.... the mount. The famous brands that uses this type os mount are known to be great. But the "Chinos" version... not so good.

    Do own or have taken a look at this lamp? Is it good, quality wise? How do you think iT would compare to SSx3 and Nitefire HERO2 regarding to power output and overall quality?
    It uses XPE leds on purpose since this version doesn't have brightness adjustment for leds. So you have 3 modes - center led only, side leds only (low-brightness mode with low current from battery), center + side leds.
    It won't be as bright as SSX3 but you may be able to replace side leds with XML if you need same brightness.
    I don't have it yet. And anyway lets keep the discussion of bike lights in another topics, this one is about batteries

    From what you have seen what is the best, cost efective light for the BARS (not using any headlamp with along with it), with 2, 3 and 4 leds?
    Best OR cost effective? These things are kinda different
    Cost effective is solarstorm x2 since you can get it for $25-35. Best...well for me its Singfire SF-530.

    You guys think this would be great battery holder or the USB plug would be a problem? The screw looks solid in this... better than the one we saw in Kaidomain?!?!
    It won't work with most lights due to 5v output (too low for 8.4v lights and too high for 4.2v lights) Its made for this light only:
    https://www.fasttech.com/products/1446903
    You can probably find a few other chinese lights with usb input, I've seen them on aliexpress - but its still a very unusual battery pack. The whole idea behind it is the ability to recharge your usb gadgets on the ride using its usb port.

  39. #189
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    Quote Originally Posted by Kir View Post
    It uses XPE leds on purpose since this version doesn't have brightness adjustment for leds. So you have 3 modes - center led only, side leds only (low-brightness mode with low current from battery), center + side leds.
    It won't be as bright as SSX3 but you may be able to replace side leds with XML if you need same brightness.
    I don't have it yet. And anyway lets keep the discussion of bike lights in another topics, this one is about batteries


    Best OR cost effective? These things are kinda different
    Cost effective is solarstorm x2 since you can get it for $25-35. Best...well for me its Singfire SF-530.


    It won't work with most lights due to 5v output (too low for 8.4v lights and too high for 4.2v lights) Its made for this light only:
    https://www.fasttech.com/products/1446903
    You can probably find a few other chinese lights with usb input, I've seen them on aliexpress - but its still a very unusual battery pack. The whole idea behind it is the ability to recharge your usb gadgets on the ride using its usb port.
    I think this battery outputs 8.4v from the charging socket and 5v from the usb. If so, it's multi purpose.
    I can't see the usb plug carrying enough current to power those 3 xml2 leds.
    If true, it could be a cool solution.

  40. #190
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    I am thinking of building a battery pack for my SSX2. I haven't used it yet, but I don't expect too much from stock batteries since the price was $32...

    I've gone through posts in this and some other topics and to sum it up, I have to buy housing. There are 3 contenders:
    1.) 2S2P 7.4V 18650 Holder with Battery Build-in PCM Protection Circuit Module
    2.) 4 x 18650 Battery Set for Bicycle Light
    3.) Solarstorm portable water-proof 4*18650 battery box rechargeable battery case

    Which one to choose? Since 1 and 3 are cheaper and batteries in 2 are probably crap am deciding between 1 and 3. 3 has better, waterproof housing, so 3 wins.
    Did I miss something?

    Once I have housing I only need 4 good batteries and we are ready to go. I will order batteries that Kir mentioned in this post.

    Edit: hmm like someone already mentioned postage price for Solarstorm housing is crazy. It looks like I will have to wait for other stores to get them.

  41. #191
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    Kir, or anyone else.

    Can you please confirm that the favourite battery holder, link:

    High Quality Rechargeable 8.4v 4*18650 4400 mAh bicycle light battery pack for solarstorm X2 bike light of battery set-in Rechargeable Batteries from Electrical Equipment & Supplies on Aliexpress.com

    Works with (connects to) the Solarstorm X2, the Solarstorm X2 review thread is inconclusive.

  42. #192
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    Quote Originally Posted by JakeS View Post
    I think this battery outputs 8.4v from the charging socket and 5v from the usb. If so, it's multi purpose.
    I can't see the usb plug carrying enough current to power those 3 xml2 leds.
    If true, it could be a cool solution.
    Dual outputs...hmm, this could work. Gotta order it to test.

    Which one to choose? Since 1 and 3 are cheaper and batteries in 2 are probably crap am deciding between 1 and 3. 3 has better, waterproof housing, so 3 wins.
    Did I miss something?
    1 is just a holder, you'll have to solder connector to it and use some kinda of bag to store it.
    2 is tested and proven to work great. Even if batteries are crap its still worth it at $13
    3 - we don't know anything about it yet and its more expensive, so its hard to say

    Works with (connects to) the Solarstorm X2, the Solarstorm X2 review thread is inconclusive.
    It will work but it won't be waterproof like original SSX2 connector and you'll have to cut off a few mm of extra rubber from it to fully insert it into SSX2 connector.

  43. #193
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    Quote Originally Posted by Kir View Post
    3 - we don't know anything about it yet and its more expensive, so its hard to say
    If the batteries in the other pack for $12 are not useful it is cheaper in case that you don't have to pay postage. You've also mentioned that 2 is not made to be open to often. Solarstorm version looks (on pictures) better in that respect and connector is probably fully compatible with SSX2.

    I agree option 2 is probably worth it. With original and that battery you can probably get enough of power for a few hours.

  44. #194
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    Are the Magichsine/Clone battery chargers suitable for use with these packs or can anyone recommend anything better? Especially if I'm going to be putting high quality 3400mAh Panasonic cells in these cases.

    Thanks
    Tom

  45. #195
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    Hi all,
    Just got a Solarstorm X2 from some seller on ebay. The light is great, however the battery pack is terrible. After charging all day and attaching it to the light, the indicator leds go from 3 leds to 2 after only a few seconds on low beam. After doing some research on this site, I realized that I probably got a dud since mine has the blue shrink wrap. Does anyone have a suggestion for a good "plug and play" battery upgrade for this light? I don't want to get into soldering and buying separate cells, etc. Also would still like to use the "waterproof connector" functionality if possible. I apologize if someone has already answered a similar question... I'm trying to decide whether to pay the money to return the light to China or bite the bullet and buy a new battery pack for it.

  46. #196
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    Replacement 8.4V 6600mAh Rechargeable Battery Packs

    I bought two of these Replacement 8.4V 6600mAh Rechargeable Battery Packs last week from Amazon, tried them last night for two hours on my basic china lights( 1 triple XML & 1 single XML), worked great. Decent pouch, velcro attachment. $17ea + 2day free shipping for Prime members.

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    Quote Originally Posted by ruffrydah View Post
    Hi all,
    Just got a Solarstorm X2 from some seller on ebay. The light is great, however the battery pack is terrible. After charging all day and attaching it to the light, the indicator leds go from 3 leds to 2 after only a few seconds on low beam. After doing some research on this site, I realized that I probably got a dud since mine has the blue shrink wrap. Does anyone have a suggestion for a good "plug and play" battery upgrade for this light? I don't want to get into soldering and buying separate cells, etc. Also would still like to use the "waterproof connector" functionality if possible. I apologize if someone has already answered a similar question... I'm trying to decide whether to pay the money to return the light to China or bite the bullet and buy a new battery pack for it.
    Last edited by patski; 10-05-2013 at 08:56 AM.

  47. #197
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    patski, thanks for the suggestion, that sounds like a decent deal, especially with free 2 day shipping!

  48. #198
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    Hey guys, I think I'm going to order a Solarstorm x2 head only and the Solarstorm battery pack that Kir found (Aliexpress.com : Buy Solarstorm portable water proof 4*18650 battery box rechargeable battery case used for bike light from Reliable Other Batteries suppliers on Shenzhen Blackshadow Technology Co., LTD). The only thing I'm unsure about is if I fill the battery pack with some nice cells, what charger can I use to charge them while they're in the pack? Anyone know a seller which sells just the charging cable?

    Edit: I found the solarstorm charger on lightsmall, the charger (like all the bike pack chargers) is a 8.4v Li-po charger. My question now is: if I use normal 3.7v 18650s in the 2s-2p formation that will make the pack 7.4v (I think). Does that mean that an 8.4v charger will somehow overcharge the cells?

    Cheers!
    Last edited by Lord Marmaduke; 10-05-2013 at 09:01 AM.

  49. #199
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    Quote Originally Posted by Lord Marmaduke View Post
    Edit: I found the solarstorm charger on lightsmall, the charger (like all the bike pack chargers) is a 8.4v Li-po charger. My question now is: if I use normal 3.7v 18650s in the 2s-2p formation that will make the pack 7.4v (I think). Does that mean that an 8.4v charger will somehow overcharge the cells?
    18650s are 3.7V nominal and 4.2V fresh off the charger so 8.4V charger is correct for 2S setups.

  50. #200
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    Thanks that's great

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