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  1. #1
    Kir
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    User review: YINDING YD-2XU2 (Gemini Duo clone)

    Nobody has written a review of this popular light so I'll do it
    Sorry for any possible errors or weird spelling - english is not my native language. Feel free to ask me any questions about this light, I'll try to answer them all.

    https://www.fasttech.com/p/1443727
    You can buy it here and on other websites. I'm writing a review of this custom version with XM-L2 neutral white leds:
    Free shipping 1Set CREE XML2 T6 3B Bike Light 1600lm Waterproof Bicycle Light LED HeadLamp + 8.4v Battery Pack + Charger-in Bicycle Light from Sports & Entertainment on Aliexpress.com


    «Lights reviews - Yinding 2xU2 (Gemini Duo Clone)» all pictures are available here, you can also view high-res originals (click on any picture, bottom-right corner will list all resolutions, use google translate if needed)

    PACKAGING / CONTENTS
    Cardboard "gift box", used for many chinese bike lights:

    You'll get the light, battery, charger, headstrap mount, 2 rubber rings for handlebar mount and the box.

    DESIGN

    This light is a direct copy of Gemini Duo and probably the smallest 2 XML light that you can buy atm.
    Gemini Duo ? 2013 Mtbr Lights Shootout | Mountain Bike Review
    Gemini Duo 4 Cell front light - BikeRadar
    Gemini Duo: Nine Brilliant, High-Powered Lights | Bicycling Magazine
    You can read reviews of the original at the links above, most of the info there can be applied to this clone. Main differences between the original and the clone are much worse battery and 3 fixed brightness levels on clone vs 3 programmable levels on original.

    Light's head is very small with 2 plastic TIR lenses over the leds. Weight of the head is only 59g, dimensions are 44x23x34mm without plastic mount.
    There is a single button on the back with model name engraved near it.



    Yinding compared to SolarStorm X2 and Fandyfire D99 (another simular light with TIR lenses, but a bit larger and heavier).


    It has a magicshine-style connector, mount with piece of rubber glued on it (thats a sign of good quality light, cheaper lights don't use rubber there) and waterproof o-ring on the power cable.

    You can also rotate the mount, another rare feature for chinese lights.
    Mounting area is flat without any cable holes so you can use/make your own mount, see post #11 for example:
    User review: YINDING YD-2XU2 (Gemini Duo clone)

    BATTERY

    Usual cheap chinese battery, 4x18650 2S2P cells in shrinkwrap, 7.4v voltage. Not waterproof! You have to cover it in plastic bags/rubber balloon/gloves or something to protect it from water or it'll short-circuit like this:

    Battery capacity is kinda ok for chinese batteries but still horrible. I have 2 lights and here are the discharge graphs for them:

    Battery 1, 3600mAh with very weird unstable voltage on discharge cycle.

    Battery 2, 3200mAh with good stable voltage.
    Both of these batteries will work for about 2 hours on high mode and imo you should replace them with something better from Xeccon/Magicshine/Gemini.

    UI
    4 modes, switched with single click in this sequence: off-low-mid-high-off and repeat. Strobe on hold, high frequency, not very usable imo.

    TEARDOWN

    Lets open it up and see how its made
    Starting from the mount:

    3mm hex screw, plastic mount, 2 rubber o-rings between the screw, mount and the case.

    O-rings removed. These o-rings will hold the mount at any angle so you can turn it and leave at specific angle that you need.
    Nothing else on the bottom so lets move to the front.

    2 small hex screws (about 1.5mm) hold the front part of the case. Removing the screws and front part gives us access to the 2 plastic TIR lenses and XM-L2 leds. Both lenses and the front part of the case have rubber o-rings under them so this light should be competely waterproof.

    Leds are mounted on aluminium backplate and connected in series. You can also see that this specific version has XM-L2 leds (silver color of the led, 2 bounding wires instead of 3 on 1st gen) which the seller replaced himself...and it wasn't a very good job - there are fingerprints all over the plate and wires soldering is not very good.
    Moving on, next we have to remove 2 screws on the sides of led's backplate:

    These long screws are connected to the back side of the case.

    With screws removed we can also lift up led's backplate to discover proper amount of good thermal paste underneath - everything is ok here. And here is an important part - led's backplate is mounted directly on the outer case, there is no additional pills here so thermal transfer is excellent (unlike D99 where leds were basically handing in air).

    Moving on to the back, another view of the case inside and metal wall in the middle. There is a small hole in the center for led's wires and a hole on the side for power wire. Power wire doesn't have any pull-out protection so be careful with it.


    2 pics of the driver and we're done. Soldering looks good everywhere, driver is marked "HX-1343". There are 2 smd leds for battery charge level indication, R110 current sense resistor that you can replace to increase current on leds (not recommended though, case can't really handle any additional heat).

    ELECTRONICS

    This time I'll use a picture with every measurement:


    A few addional notes about it:
    Current from battery is measured on external PSU set at 7.5v, thats the average voltage on discharge cycle. You can divide your battery capacity on current to get estimated runtime in hours (for the included battery at high mode its 3200/1700 = 1.88 hours, a good quality battery like Xeccon 5200mAh will give you 3.06 hours).
    There are 2 values for current on leds because driver is a bit weird...it usually outputs 1.7A on high, BUT when input voltage is 6.9-7.2v it jumps to 2A. I have no idea why this is happening, but I double checked everything and it just works like this.
    Driver will go out of regulation at 6.4v on input = leds will start to dim. This is a good feature as you'll notice that even if your light is mounted on helmet and you can't see the battery indicator on it. At about 5v it will turn off competely.
    Lumens output is a very rough estimation (I don't have integrated sphere to properly measure lumens output) based on this calculator:
    LEDCalc.fonarevka.ru
    And with 20% reduction for losses in optics to calculate estimated OTF lumens. Still it should be close to real output, I verified that by calculating and comparing results for other lights/flashlights.

    IMPORTANT NOTICE!
    This light is very small and very lightweight so it will heat up VERY FAST. While moving it will be cooled by air so its not a problem, but don't run it on high mode for a long time when standing still - it can and will overheat very easily.
    Some users have reported that it has overheat protection that will dim/turn off the light but I haven't tested that and I don't recommend to rely on such protections - overheating is bad for leds and electronics.
    Quote Originally Posted by znomit
    Tested the thermal cutoff today.
    Cuts in around 70C (IR thermometer).
    No hysteresis so theres a bit of flicker before it come fully on… guess thats a good visual warning. Cuts all modes back by half.

    BEAM PROFILE

    Compared to D99 on the right:

    D99 uses the same type of lenses with wider angle (probably 22-30 degrees compared to 15 on Yinding) so the beam is almost the same. Its wider on D99 but its hard to notice on that picture.
    Compared to SolarStorm X2 on the right:

    Here you can see the difference between TIR lens and reflector. Reflectors on SSX2 have noticable sidespill and tight hotspot in the center while TIR on Yinding gives just one wide hotspot.
    You can also see the difference in color temperature in both pictures. Neutral-white XM-L2 leds have more natural-looking slightly yellow color vs blue-white color of typical cheap chinese cool white XM-L leds.

    BEAMSHOTS

    2 simple beamshots on the ceiling:


    This light uses TIR lenses (probably 15 degree wide like these ones 15 Degree Angle LED Optical Lens - Black - Free Shipping - DealExtreme) that give it a wide and floody hotspot with gradual fade at the edges, which is less tiring on the trail than usual high contrast reflector lights. Not a very good thrower though but should be an excellent light for the bars.
    Its not a pure flood light and not a thrower, its somewhere in between and works great as a single light for low and medium speed riding on the roads/trails.
    And a beamshot on the road, sorry for cellphone quality:

    And here are some beamshots stolen from another threads and sites
    Name:  1380893305947-uk6ht7ej5eno-500-70.jpg
Views: 17584
Size:  34.7 KB




    CONCLUSION

    Pros:
    Very small, very light.
    Good mount.
    Good wide-hotspot beam.
    Excellent thermal transfer from leds to outer case.
    XM-L2 neutral white leds in this version, better color rendition and easier on eyes compared to cool white.

    Cons:
    Bad batteries.
    Overheats very easily.
    No brightness levels adjustment like on original Gemini Duo.

    Overall - great light imo, one of the best chinese lights atm. Not very powerful but so small and light! I will probably use it myself as a backup light for long rides, it doesn't take much space on the handlebars and provides good amount of light for forest/trails riding.
    Last edited by Kir; 11-22-2013 at 05:40 PM.

  2. #2
    Kir
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    And another review done! Will proofread it tomorrow and fix any errors.
    It's getting cold and rainy here so hopefully I'll have more time to write my reviews. Next up is Xeccon Spiker 1206 review/comparison with cheap chinese 1xml light, I'll try to show what you're paying for when buying expensive brand name lights. After that - huge Solarstorm X2 comparison, got 9 samples here to show all the variety and lottery of popular chinese bike lights (spoiler alert - expect _horrible_ batteries and random output/random quality ).

  3. #3
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    Nicely done Kir, great review!

  4. #4
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    Excellent review Kir. Thank you.

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    Kir,

    Great job. Do you have any idea what the current draw is for the original Gemini duo?

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    Thanks Kir, excellent review!

  7. #7
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    Confused...is the one you tested use the XM-L2 or XML-U2 LEDs?
    Geologist by trade...bicycle mechanic (former) by the grace of God!

    2012 Specialized Stumpy EVO 29 HT

  8. #8
    Kir
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    Quote Originally Posted by steelhmr View Post
    Kir,

    Great job. Do you have any idea what the current draw is for the original Gemini duo?
    No idea about that, I just don't have any spare money to buy expensive lights like Gemini for testing.

    Confused...is the one you tested use the XM-L2 or XML-U2 LEDs?
    This was for XM-L2 version, still waiting for my U2 version. When I'll get it I'll add data to measurements but it should be about the same.

  9. #9
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    Seems all the places are out of the ~$50 and now its ~$80....that is Gemini territory (light head only...which is all you are really getting here).
    Geologist by trade...bicycle mechanic (former) by the grace of God!

    2012 Specialized Stumpy EVO 29 HT

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    Thanks Kir, great info !!

  11. #11
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    Quote Originally Posted by Kir View Post

    CONCLUSION

    Pros:
    Very small, very light.
    Good mount.
    Good floody beam.
    Excellent thermal transfer from leds to outer case.
    XM-L2 neutral white leds in this version, better color rendition and easier on eyes compared to cool white.

    Cons:
    Bad batteries.
    Overheats very easily.
    No brightness levels adjustment like on original Gemini Duo.
    Great review...let me add a few cents

    Pros:
    Even XML U2 version has quite nice white color light
    The cable does not come out at the mount area and this area is flat. That means you can easily adjust your own mount...like this (This goes for 880clone and SSX2 as well)



    Cons:
    there is small weak point for water...that are the screws for front panel. I wraped screws with teflon tape and now I can throw it in water and be very confident. (excluding the battery)
    no memory mode...at least press and hold function should be off and not strobe.
    Mounting O-rings are really crapy!!! Buy silicone ones!

    *the beam is actually quite tight, no where near to flood. That would be MJ872. You could say it is very floody spot light. I think perfect beam for helmet light for off road use.
    *battery is not that bad compare to other cheap bike light sets. (3x clone, SSX2...) I measured my pack to around 3500+mAh. (MJ828 battery has just 10-20% more capacity and it costs almost as Yinding whole set.)

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    That XM-L2 soldering is poor Seems to be done by hand and not in the oven.

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    Any link for the silicone rings?

  14. #14
    Kir
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    Thanks for all the info and comments! Updated few section of review.

    Quote Originally Posted by TiGeo View Post
    Seems all the places are out of the ~$50 and now its ~$80....that is Gemini territory (light head only...which is all you are really getting here).
    Not really, head only is $43 shipped on aliexpress while gemini duo is $93+shipping on action led lights.

    bhocewar, I dont think that water can get through screws in front unless you're submerging it in water
    Floody spot light is a good description for it. I'll make a few rides and then update info about beam profile.
    15 Degree Angle LED Optical Lens - Black - Free Shipping - DealExtreme - looks very simular so its TIR lenses could be 15-20 degrees too, which is kinda tight but with good hotspot brightness.

    MK96, of course its done by hand - oven is too expensive And I actually can make a much better soldering myself.

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    Do you have a link to just the head?

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    Quote Originally Posted by Kir View Post
    15 Degree Angle LED Optical Lens - Black - Free Shipping - DealExtreme - looks very simular so its TIR lenses could be 15-20 degrees too, which is kinda tight but with good hotspot brightness.
    Might be the same. I would say Yinding has 15° optics. DX measurments are 22mmX13mm. Yindings are 20,0X11,3mm. If DX didnt measure with the black housing it might be exact the same dimensions.

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    Oh and a link to any different type of reflectors to change the beam pattern?

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    Quote Originally Posted by bhocewar View Post
    Might be the same. I would say Yinding has 15° optics. DX measurments are 22mmX13mm. Yindings are 20,0X11,3mm. If DX didnt measure with the black housing it might be exact the same dimensions.
    https://www.fasttech.com/products/1144800

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    I have ordered a few different optics to see differences in beam patterns.

    I can leave one original optic in and change the rest to see what happens.

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    If you wanted a tighter beam, these 8 Degree Angle LED Optical Lens - Black might fit.

    DX also has 5, 20, and 30 degree that might fit as well.

  21. #21
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    Quote Originally Posted by Kir View Post
    Not really, head only is $43 shipped on aliexpress while gemini duo is $93+shipping on action led lights.
    Action has the 2013 Due (XML U2) for ~$70 + shipping so call it $75 (10% off). I was basing my comment on the $80 I am seeing online...I didn't see the $43 head-only option on Ali.
    Geologist by trade...bicycle mechanic (former) by the grace of God!

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    It would be nice to have two DUOs next to each other with inner lenses about 15 and outer ones with 30 - 45 to spread some light to sides. I will try that with 880 clones.

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    The fact that the AMPS get higher as the battery depletes is good news, it has either a buck or boost driver. A lot of cheap chinese lights use linear drivers which means the light output decreases as the batteries deplete. Case in point given an hours usage a light that starts out at say 1400l will probably drop well below 1000l.

    Buck/boost drivers increase the current as the battery voltage decreases, meaning light output remains the same until the batteries are almost fully depleted. I bet this light pumps out more lumens after 15-20 minutes than most cheap chinese lights that are said to pump out 1200+ lumens, and the superior heat design will also contribute to better and longer lasting brightness.

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    Kir, thanks for the great review

    Kir (or other), Can you tell me the difference between these 2...

    https://www.fasttech.com/p/1443727
    You can buy it here and on other websites. I'm writing a review of this custom version with XM-L2 neutral white leds:
    Free shipping 1Set CREE XML2 T6 3B Bike Light 1600lm Waterproof Bicycle Light LED HeadLamp + 8.4v Battery Pack + Charger-in Bicycle Light from Sports & Entertainment on Aliexpress.com

    I know that the one from Aliexpress is no longer available, but you mention "custom version with XM-L2 neutral white leds". Is this a noticeable difference? I know that the ~$50 offering from fasttech has a less than optimal battery -- but I will be replacing that with something from Xeccon (hopefully small one for helmet and larger one for bars). Will be using for commuting and when timing works out - nite riding/24 hr racing. Thoughts on the charger from the fasttech offering (safety), and how are people doing custom/semi-custom helmet mounts.

  25. #25
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    err, I just got one of these and it's great

    I don't know about using it as a backup, it is my new primary on the
    bars with zebralight h600w mkII on the noggin

    will switch to pannovo 4x18650 8.4 pack from DX with my own 18650's to
    fix the wimpy yinding pack.

    as it was, I rode 2 hours at 32 deg F and it ran
    on high the whole time with the stock 4400mah pack.

    this thing wins the tiny light race hands down
    enough lumens and throw to ride anywhere imho...not lacking in light output (to me)

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    Quote Originally Posted by TiGeo View Post
    Seems all the places are out of the ~$50 and now its ~$80....that is Gemini territory (light head only...which is all you are really getting here).
    Looks like it is back in stock. Head unit only, no battery

    Free shipping 1Set CREE XML2 T6 3B Bike Light 1600lm Waterproof Bicycle Light LED HeadLamp+ Charger (without battery)-in Bicycle Light from Sports & Entertainment on Aliexpress.com

  27. #27
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    Still....$65 head only...the 2013 Duo (head only) is not that much more.
    Geologist by trade...bicycle mechanic (former) by the grace of God!

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    Quote Originally Posted by TiGeo View Post
    Still....$65 head only...the 2013 Duo (head only) is not that much more.
    Considering the difference in price, the difference in the two vendors and the product differences I'd go with Gemini Duo from Action LED. The Aliexpress price is way too much for a lamp without battery. Duo clone ( lamp only ) should not be more than $40 tops.

  29. #29
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    wallbuys has these clones

    battery + light 48 bucks free ship

  30. #30
    AZ
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    Quote Originally Posted by 127.0.0.1 View Post
    wallbuys has these clones

    battery + light 48 bucks free ship



    Link?

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    Quote Originally Posted by Cat-man-do View Post
    Considering the difference in price, the difference in the two vendors and the product differences I'd go with Gemini Duo from Action LED. The Aliexpress price is way too much for a lamp without battery. Duo clone ( lamp only ) should not be more than $40 tops.
    The aliexpress does have the newer L2 led's. I purchased this and will be interested to see how it compares to my original duo ( 2013 model), in terms of brightness and efficiently.

  32. #32
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    $46.46 Yinding 2 x CREE XM-L U2 1800LM 4-Mode White LED Bike Light / Headlamp-Red(4x18650)


    click OTHER and you can find black and blue as well

    they got this to me in US in 14 days exactly

    can track shipment here (any china ship track)
    International Track and Trace service


    Wallbuys doesn't have problems shipping batts
    Battery can ship normally
    1.Now Battery can ship normally,u can buy it from now on

  33. #33
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    Quote Originally Posted by eggdog View Post
    The aliexpress does have the newer L2 led's. I purchased this and will be interested to see how it compares to my original duo ( 2013 model), in terms of brightness and efficiently.
    The MTBR shootout measured the 2013 Duo at 1100 lumens and the 2014 at 1200, so that might be just barely perceptible. It would be interesting to see the runtime difference.

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    Quote Originally Posted by TiGeo View Post
    Action has the 2013 Due (XML U2) for ~$70 + shipping so call it $75.
    Speaking of links, do you have one for this deal? When I check the ActionLed site, I see the same that Kir does. $93.00 for the head only ... I'd certainly think about picking one up at the lower price.

  35. #35
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    There is a 10% off code...can't post link from phone but you just need to look at their main page and there is a link off it for their clearance stuff...code is in there.

    Sent from my SCH-I545 using Tapatalk
    Geologist by trade...bicycle mechanic (former) by the grace of God!

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    Ah, gotcha, thanks! Price + shipping is around $85.00, but still a pretty great deal.

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    I must have mistyped..sorry about that..you are correct.

    Sent from my SCH-I545 using Tapatalk
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    Nice review.

    I know a bit about designing LED drivers, so thought I'd add my 2 cents worth:

    1 - driver board is very well laid out, quality of soldering is the best I've seen in an inexpensive light from China.

    2 - Driver chip should allow higher voltage power supplies, but I'm not sure of the voltage of some of the other parts. One of my projects over the xmas holidays will be to solder on some different components and see if I can run the light on 11.1 and 14.8 volt battery packs. The voltage sensor in the light may be modifiable to work with other voltages. Google for SM5241 if interested in chip specs. Datasheet is in Chinese, anybody care to translate?

    3 - current sense resistor is a lower power rating than I would choose. I want to experiment with some different sized ones rated at a watt or so. On the plus side sense resistor is soldered to two fairly big copper planes that should help dissipate heat.

    4 - I'm not seeing a temperature sensor on the driver board (to dim LEDs if they get too hot. Could be one built into the microcontroller (on side of board with push button, could be a Microchip PIC). Thermal path from housing to board not very good. I will add some thermally conductive glue and see if lights get dim when housing is hot.

    5 - my light came with perhaps a bit too much heat conductive paste between LED board and housing (your pictures looked like yous had a bit less). If you get one of these lights and the housing takes more than a minute or so to heat up when running on high, open it up and remove some of the paste with a Q-tip. Spread what's left in a thin layer on back of LED board and on housing. Keep paste away from hole for LED wires. Press board down and wiggle/slide back and forth before putting bolts back in. A thinner layer of paste will conduct heat better. I will probably experiment with using a thermal epoxy to see if that works better.

    6 - battery pack and charger not the greatest. I did not open the battery up but it looks like a low quality Magicshine pack from the outside. It has worked pretty well on a few test rides, but I never trust stuff like this till I open it up. The charger looks well laid out and soldering looks pretty decent. It does get warm during charging, so that always bothers me. It does not have an isolation transformer, so this will probably never get UL listed :-) I bought one of these:

    PANNOVO B-C04 Water Resistant 4 x 18650 Battery Pack Case for Bike Lamp - Black - Free Shipping - DealExtreme

    and it works with light and some higher quality 18650 batteries I have. The down side to this is you need to buy 4 batteries, the holder, and a charger. But you get around charge balance issues and can use good quality batteries instead of unknown quality batteries. I'm using batteries with a built in protection PCB. There is probably not a protection PCB in the battery holder so be careful if using unprotected cells.

    This seems like a well designed, well produced light. I will try to generate a schematic and report on my experiments over or after the holidays (my schedule till then is pretty full).

    mhahn
    Nimium est melior!

  39. #39
    Kir
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    Fixed one small error in electronics section, added beam profile to compare beam and color temperature.
    Finally found a good dark place near my home so I'll start adding beamshots to my reviews. They will be made from cellphone so don't expect great quality...I can't carry my DSLR on my bike so thats the best that I can do right now.

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    Quote Originally Posted by mhahn@hvc.rr.com View Post
    4 - I'm not seeing a temperature sensor on the driver board (to dim LEDs if they get too hot. Could be one built into the microcontroller (on side of board with push button, could be a Microchip PIC). Thermal path from housing to board not very good. I will add some thermally conductive glue and see if lights get dim when housing is hot.
    Mine drops to half power when the case is around 70C (which doesn't take long on the bench).
    Its jumps up and down for a bit before throttling back continuously so no hysteresis on the thermal monitoring.

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    I just did some research, seems that the best deal going currently is at wallbuys with a 11% coupon code so $43 with battery etc.
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    11% coupon code?

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    Yep Kir, got it from retailmenot..I plugged it to test and it worked. Code is WALLBUYSALLMAGIC
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    Great, thanks for info. This is the best deal atm and since they're using Malaysia/Switzerland post they will send it with battery too.

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    I really think I will "pull the trigger" for $45 just to have a different light to mess around with for my bar.
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    Sweet deal for 43$.

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    A summary of where to get the yinding. I checked all of the following sites for this light:

    fasttech
    dx
    wallbuys
    aliexpress
    kaidomain
    lightmalls
    ebay
    amazon

    They all had it except for kaidomain and lightmalls; ebay and amazon have it listed for much more $$ than the others ($60-70 range). It appears from reading all of these threads that only aliexpress has the upgraded xm-l2 version; the rest are are xml u2. Wallbuys has the lowest price ($43 w/coupon code). I can't find any true light-head only options; the ones that don't come with a battery are that way due to shipping issues. Anybody else want to add to this that has done some searching around?
    Last edited by TiGeo; 11-23-2013 at 12:27 PM.
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    Quote Originally Posted by TiGeo View Post
    It appears from reading all of these threads that only fasttech has the upgraded xm-l2 version; the rest are are xml u2.
    ??????

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    Quote Originally Posted by bhocewar View Post
    ??????
    ??????
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    I mean...where do you see Fasttech having XML2 Yinding?

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    Quote Originally Posted by TiGeo View Post
    ??????
    Alliexpress also has the updated led. XML2 ($62 for light only.)

    I just got notification that mine just shipped, and I will do a comparison side by side with my original duo ( 2013) model.

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    Re: User review: YINDING YD-2XU2 (Gemini Duo clone)

    Quote Originally Posted by bhocewar View Post
    I mean...where do you see Fasttech having XML2 Yinding?
    Go to the review on the first page.....

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    Can you direct me to that review saying it has XML2 leds?

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    Quote Originally Posted by bhocewar View Post
    Can you direct me to that review saying it has XML2 leds?
    Dude...its post #1 of this thread...read it.
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    Dude, Kir bought his custom XML2 Yinding from Aliexpres not from Fasttech.

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    Re: User review: YINDING YD-2XU2 (Gemini Duo clone)

    Quote Originally Posted by bhocewar View Post
    Dude, Kir bought his custom XML2 Yinding from Aliexpres not from Fasttech.
    My bad..you are correct...aliexpress it is then. I have edited my post to reflect this.

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    Last edited by TiGeo; 11-23-2013 at 12:27 PM.
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    TiGeo can you tell me were they sell the XML2 on Ali express?

    YINDING YD 2XU2 Cree XM L U2 1200LM 4 Mode Cool White Bikelight Red-in Bicycle Light from Sports & Entertainment on Aliexpress.com

    From the description it clearly says XML - U2???

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    Quote Originally Posted by TiGeo View Post
    My bad..you are correct...aliexpress it is then. I have edited my post to reflect this.

    Sent from my SCH-I545 using Tapatalk
    No, you were right the first time. Link from the first post. Not sure if Kir posted the wrong link. Maybe he has the XM-L (U2) version.

    edit...Oh, I see you argue on whither Fasttech or aliexpress...nevermind

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    Ok...Kir specifically mentions in the first post of this thread that he has a "custom" Yinding with the XM-L2 LEDs. The link shows this as being from Aliexpress (per bohcewar). He also linked one from Fasttech first, but this I believe just has the XM-L U2 LEDs (my mistake). Trd620, just click on Cat's link to go the XM-L2 light.
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    Is there a real world difference in XML2 vs XML U2?

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    Has anyone bought the light from wallbuys and if so did you get a battery pack it?

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    Quote Originally Posted by superkermit View Post
    Is there a real world difference in XML2 vs XML U2?
    XML2 should be a tad brighter and a bit more efficient. I have the original Gemini Duo (XML U2) and it is bright and am currently running it as a bar light. Since I really like the size, quality and design of the Duo, I want to try the upgraded LED for my helmet.

    For my use, this should be a perfect set up. My XML2 just shipped from Aliexpress, so I should have it shortly. Once I get it I will make some side by side comparisons in regards to brightness and run times..

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    Quote Originally Posted by superkermit View Post
    Is there a real world difference in XML2 vs XML U2?
    Yes, but not everyone can tell the difference. If you compare the two in a head to head comparison using the same optics, driver and lamp you should be able to detect the difference in output ( on high ). Will the difference change how you ride?...probably not.

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    Quote Originally Posted by Trd620 View Post
    Has anyone bought the light from wallbuys and if so did you get a battery pack it?
    yes and yes
    14 days delivery from web click to mailbox

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    thanks for that 127.0.0.1 will be placing an order tonight!

    Just out of curiosity would any know if it is possible to install a remote switch from a battery pack to control the light levels or does it have to go to the light head? I went for a night ride on the weekend a remote switch would have been ideal to ensure the light head does not overheat

  67. #67
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    Quote Originally Posted by superkermit View Post
    Is there a real world difference in XML2 vs XML U2?
    You won't notice brightness increase on XM-L2 leds, but you probably will notice neutral-white color of 3B bin which gives much better color rendering.

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    Quote Originally Posted by Kir View Post
    You won't notice brightness increase on XM-L2 leds, but you probably will notice neutral-white color of 3B bin which gives much better color rendering.
    I probably should have assumed that the poster was asking the question in regard to the available Duo-clone. That being the case yours in the better answer.
    My answer was in regard to just the LED's themselves with all other things ( amps, optics, bin and tint level ) being equal which of course at most times is not the case.

    When I first saw the beam photos of the XM-L2 T6 3B tint D-clone my first thought was that the beam shot of the XM-L ( U2 ) version looked brighter. Hard to compare visual output on warmer binned upgraded emitters to brighter/whiter bins on lower grade emitters. If I had a chance to compare both with my own eyes, only then could I know for sure. With these cheap lamps you never know when they are going to use a different driver or optic that might also change how the output looks. Like I said before, "rarely are all things equal".

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    The aliexpress seller (Simon Mao) can replace the LED in the light with T5 5B1 or T6 4C at no charge - it least he did it for me (bought a total of 7 of these lights from him).

    He is not a man of many words but he ships quick and he keeps his word (ordered several lights from him off Alieypress - just sent him money via PayPal - and got my items safe and sound).

    Yes the soldering is sloppy (as seen in the first post - same was in my lights) but hey for those who don't know how to use a soldering iron it's a chance to get a Neutral White XML2 at no charge.

    I guess you can ask to replace the led with whatever he's got in stock:
    CREE XML2 LED - Shop Cheap CREE XML2 LED from China CREE XML2 LED Suppliers at Shenzhen Great Wall Technology Co., Ltd. on Aliexpress.com

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    Quote Originally Posted by Ian_C View Post
    DX also has 5, 20, and 30 degree that might fit as well.
    Could you post a link to the 5 degrees lens?

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    Hi All,

    Just got the XML2 version from aliexpress for $45, let's see how long it will take before it gets here.

    So you guys mentioned the battery case/holder and charger is garbage?

    Where can I get an alternate replacement?

    Can I run this of a 2 cell battery (to save weight)?
    My commute at night is only ~30 mins.

    Do they make a case/holder for 2 cells?

    Can someone school me on battery/packs?

    Somewhere down the road I might get another one of this Yinding Clone for my helmet, can I connect 2 of these lights to a single 4 Cell Battery pack?

    Thanks for all the info guys (just joined mtbr forum) and got into lighting.

  73. #73
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    Quote Originally Posted by tycoonrider View Post
    Can I run this of a 2 cell battery (to save weight)?
    My commute at night is only ~30 mins.
    The supplied battery should be OK, you'll get a weeks commute easy on medium which is still plenty of light. Remember to waterproof it.
    You'll save only 3oz switching to a 2 cell so don't bother.

  74. #74
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    I run a 2 cell battery with mine. I get over an hour of run time, with at least 80% of that on high.

    Tim

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    Quote Originally Posted by superkermit View Post
    Is there a real world difference in XML2 vs XML U2?
    somewhat....your battery will drain faster on high that is for sure. medium l2 might be close to high u2 on some lights. on a 3 stage light like this is really means: ride shorter rides brighter on high, or longer runtimes on 'medium which would almost equal u2 high brightness'.
    Last edited by 127.0.0.1; 12-10-2013 at 06:40 AM.

  76. #76
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    Quote Originally Posted by tycoonrider View Post
    ...So you guys mentioned the battery case/holder and charger is garbage?

    Where can I get an alternate replacement?

    Can I run this of a 2 cell battery (to save weight)?
    My commute at night is only ~30 mins.

    Do they make a case/holder for 2 cells?

    Can someone school me on battery/packs?

    ....Thanks for all the info guys (just joined mtbr forum) and got into lighting.
    You need to look over "The Battery Thread" as far as the schooling. That would be the better thread to get the answers you are looking for.

    Quicky answers; yes you can buy two cell ( series ) holders but you will need to supply a suitable connector plug to use with your lamp and find a way to keep the cells in place so they don't come out. All this is readily doable. You will also need a 18650 cell charger if you want to charge loose cells.

    You can of course obtain other suitable batteries at a good price. Right now the major Chinese web sites are having a problem getting the batteries out of the country due to the new shipping guidelines. ( * along with holiday delays ) Don't be surprised if your light set is delayed because of this.

    Once again, look over the last 50 posts on the Battery thread. Read what the others are saying and you should get some more ideas. If you have more questions on "what battery set-up to buy", that is the place to ask the questions.

    Oh...almost forgot...Welcome to the Lighting and bike light sub forum.

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    Quote Originally Posted by tycoonrider View Post
    Hi All,

    Just got the XML2 version from aliexpress for $45, let's see how long it will take before it gets here.

    So you guys mentioned the battery case/holder and charger is garbage?

    Where can I get an alternate replacement?

    Can I run this of a 2 cell battery (to save weight)?
    My commute at night is only ~30 mins.

    Do they make a case/holder for 2 cells?

    Can someone school me on battery/packs?

    Somewhere down the road I might get another one of this Yinding Clone for my helmet, can I connect 2 of these lights to a single 4 Cell Battery pack?

    Thanks for all the info guys (just joined mtbr forum) and got into lighting.
    Did you read the top of the add where it states that it does not include a battery???

    Because now the post is very strict ,we can not ship battery .

    Notice this bike light is not include the 8.4V battery Pack now

    Only black version in stock now

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    Thanks All

    Quote Originally Posted by robs31 View Post
    Did you read the top of the add where it states that it does not include a battery???

    Because now the post is very strict ,we can not ship battery .

    Notice this bike light is not include the 8.4V battery Pack now

    Only black version in stock now
    Yep, I noticed that, that's why I was asking about my battery option.

    Thanks for all the replies, I did not see the Battery thread Cat-man-do.

    Will commence reading that thread now.

    In Tokyo, Japan at the moment, and I was hoping to score some genuine Panasonic 18650 from the Dept store, so far it's been a bust.
    Languange barrier, gonna try another store later today.

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    I got my XML2 T6 3B version 18 days after ordering from Aliexpress. Paid 45 with the 30% off deal on the 2nd for the head only. It arrived in a plain brown box wrapped in a shipping bag and contained the light head, charger (no battery so not sure why they are sending a charger), head strap and orings with tabs. I was inspecting the light and noticed that the front plate was a little loose so I got my allen wrench to tight up the screws and discovered the threads were stripped as the screws just spun. I can pull the front plate off without touching the screws which is a little concerning. I have inquired with the seller about this. I ran the light and was pleased with the level spacing, the color and beam pattern. It's exactly what I was hoping for based on this review and other beam shots. I put it next to a small fan that would simulate a medium climbing speed with the indoor temp at 68F. Turned it on high and using my Flir thermal camera watched it climb quickly to 125F and then it slowly continued to climb up to 140F when I abandoned the test. It quickly dropped back down, probably 30-40 degrees in about a minute. The temp on the case is fairly evenly distributed with it slightly higher right next to the LED's. The front and back plates are not well connected, as would be expected with the orings, but does warm up. Overall, with the exception of the stripped screws, I am very pleased with the light.

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    Quote Originally Posted by robs31 View Post
    I got my XML2 T6 3B version 18 days after ordering from Aliexpress. Paid 45 with the 30% off deal on the 2nd for the head only. It arrived in a plain brown box wrapped in a shipping bag and contained the light head, charger (no battery so not sure why they are sending a charger), head strap and orings with tabs. I was inspecting the light and noticed that the front plate was a little loose so I got my allen wrench to tight up the screws and discovered the threads were stripped as the screws just spun. I can pull the front plate off without touching the screws which is a little concerning. I have inquired with the seller about this. I ran the light and was pleased with the level spacing, the color and beam pattern. It's exactly what I was hoping for based on this review and other beam shots. I put it next to a small fan that would simulate a medium climbing speed with the indoor temp at 68F. Turned it on high and using my Flir thermal camera watched it climb quickly to 125F and then it slowly continued to climb up to 140F when I abandoned the test. It quickly dropped back down, probably 30-40 degrees in about a minute. The temp on the case is fairly evenly distributed with it slightly higher right next to the LED's. The front and back plates are not well connected, as would be expected with the orings, but does warm up. Overall, with the exception of the stripped screws, I am very pleased with the light.
    I also got this same one from Aliexpress and my front plate screws are stripped also. I emailed them and they told me to " try and find" some screws that fit.. I also did not have the rubber gasket on the front plate.

    Played Chinese light roulette and lost! Not surprised but this is a poor quality constructed light. Glad I have an original Gemini !

  81. #81
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    Quote Originally Posted by eggdog View Post
    I also got this same one from Aliexpress and my front plate screws are stripped also. I emailed them and they told me to " try and find" some screws that fit..
    Common problem then. The treads are pretty tiny.
    One of my middle screws was just holding on. I ground the LED star down to half height to give it some more thread to grab. Worked OK.
    Also note that the rear and front screws are the same apart from the head size.

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    Sure glad I ordered a second Gemini Duo instead of the clone!

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    I don't know who is putting the t6 leds in, but yinding is specing U2. it is the second party who is shoving in the t6 led who is stripping the screws and leaving fingerprints and whatnot. if you want an unmolested and unstripped yinding, order u2 version

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    localhost you are probably mixing XM-L U2 with XM-L2 T6. XM-L2 T6 could be replaced by hand on request. T6 in 2nd generation produces more lumens than U2 in 1st gen. You can also get some nice 3B,4C, 5B tint of neutral white.

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    Quote Originally Posted by MK96 View Post
    localhost T6 in 2nd generation produces more lumens than U2 in 1st gen. You can also get som nice 3B,4C, 5B tint of neutral white.
    This is exactly why I went with this one. Like with any chinese lamp, you roll the dice and hope you don't get snake eyes. I'm currently in negotiations with the seller to recoup some of my loss.

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    Quote Originally Posted by MK96 View Post
    localhost you are probably mixing XM-L U2 with XM-L2 T6. XM-L2 T6 could be replaced by hand on request. T6 in 2nd generation produces more lumens than U2 in 1st gen. You can also get some nice 3B,4C, 5B tint of neutral white.
    what I am saying is, I now have three yindings (2 gifts) and none had any stripped screws or anything else wrong...they are all U2 version (original) so I am thinking if you get an up-modded LED one, that might be how they are arriving with stripped screws. some modder messed up ?

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    I think so. Small screws need minimum tightening torque but maybe someone doesn't know that
    Quote Originally Posted by 127.0.0.1 View Post
    some modder messed up ?

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    I thought I would post the different Beam patters from various Yinding lights I have bought. The first Picture is the first light I bought from FASTTECH. It has semi water proof connectors and they lock together, the battery dies after 3 uses which was expected. The optics on this light fell like nipples.
    Name:  Yinding Clone 1.JPG
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    The second photo is the Yinding I bought from Wallbuys as my mates were impressed by the flood beam from the one I bought from FASTTECH. I thought the lamps would have the same Beam pattern or close to it but as you can see in the photo its more of a spot beam. The connectors are a standard cheap magicshine clone type which was also a let down The optics on this this one is Flat to touch.
    Name:  Yinding Clone 2.JPG
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    The last photo is a clone of a clone, The optics on this one are flat but have holes in centre of the lenses. this lamp also fades to the next mode when you press the button. The connectors are also a cheap magicshine clone type. the cord comes underneath the lamp and it does not have front hex screws light the rest on the yinding lamps, it seams all the work is done through the rear
    Name:  Yinding Clone Clone 3.JPG
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    Quote Originally Posted by Trd620 View Post
    I thought I would post the different Beam patters from various Yinding lights I have bought. The first Picture is the first light I bought from FASTTECH. It has semi water proof connectors and they lock together, the battery dies after 3 uses which was expected. The optics on this light fell like nipples.
    Name:  Yinding Clone 1.JPG
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    The second photo is the Yinding I bought from Wallbuys as my mates were impressed by the flood beam from the one I bought from FASTTECH. I thought the lamps would have the same Beam pattern or close to it but as you can see in the photo its more of a spot beam. The connectors are a standard cheap magicshine clone type which was also a let down The optics on this this one is Flat to touch.
    Name:  Yinding Clone 2.JPG
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    The last photo is a clone of a clone, The optics on this one are flat but have holes in centre of the lenses. this lamp also fades to the next mode when you press the button. The connectors are also a cheap magicshine clone type. the cord comes underneath the lamp and it does not have front hex screws light the rest on the yinding lamps, it seams all the work is done through the rear
    Name:  Yinding Clone Clone 3.JPG
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    Good photos.

    The one bought from from Fasttech ( first photo ) looks to be the one you want if you want to bar mount the lamp. For helmet mount I'd go with the one from Walbuys ( the second photo ).

    The connectors you call "cheap Magicshine" can you provide a photo of those? thanks.

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    First one is the light from Fasttech, second is from Wallbuys and the third is the Yinding Clone. I thought I would put a few other photos for people to reference the differences, For me the Fasttach light is perfect for the bars and i was testing the Wallbuys light on my helmet and it is a great helmet light for me, I don't know how it will work out for my mates.
    Name:  photo 1.JPG
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    Name:  photo 2.JPG
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  91. #91
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    The first one "Fasttech" seems original "first batch" Yinding - Original MS connector, dimpled optics, nice beam pattern. It is exactly like my DX Yinding.
    I am also waiting for YD from Wallbuys and I hope it wont be like yours. Wallbuys have pictures that show MS connector...scam?
    I am very dissapointed to see they are ruining this great light. The third one YD clone is a joke.

  92. #92
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    Quote Originally Posted by Trd620 View Post
    First one is the light from Fasttech, second is from Wallbuys and the third is the Yinding Clone. I thought I would put a few other photos for people to reference the differences, For me the Fasttach light is perfect for the bars and i was testing the Wallbuys light on my helmet and it is a great helmet light for me, I don't know how it will work out for my mates.
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    Well, you didn't show the female battery side of the plug/connector issue. If the female side has a good rubberized or plastic ( threaded ) sleeve it should hold tight.

    There are bad male plugs out there. I have one on my tri-clone. It works with my MS female plug but not with the threaded plastic connector. For some reason the metal shaft is shorter than typical male plugs on that set-up and the plastic after the shaft is not as wide. Sort of a double whammy. I can make it work but it is the worst connector set-up I have.

    The Hunklee batteries really do need to have either the threaded plastic or rubberized shield so the male plugs have something to grab onto.

  93. #93
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    The top connector in the first photo is the Fasttech yinding and the one below it is the wallbuys one. the Fasttech battery plugs into both of the light heads, but the wallbuys battery connector cannot plug into the fasttech light head
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  94. #94
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    Quote Originally Posted by Trd620 View Post
    The top connector in the first photo is the Fasttech yinding and the one below it is the wallbuys one. the Fasttech battery plugs into both of the light heads, but the wallbuys battery connector cannot plug into the fasttech light head
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    just the opposite for my wallbuys purchases

    all three yindings had the waterproof 'pop' style connector
    which in yer photo is what fasttech sent

    freaking odd

  95. #95
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    Must be a new batch and they changed the connectors. I'm actually happy about the Beam being different it works out in my favor, see how the mates go tonight.

  96. #96
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    Quote Originally Posted by 127.0.0.1 View Post
    just the opposite for my wallbuys purchases

    freaking odd
    Same here. Also, I have a huge "flood" beam pattern, as opposed to your more spotty lamp. I purchased very early on from Wallbuys when the light + battery was $51.00 (mid August)
    Front Range Forum Moderator

  97. #97
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    it seems just aliexpress has this L2 version, does anyone contact wallbuys and ask them whether they can provide this one ??

  98. #98
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    Just got the second version from Wallbuys. Compared to my first version this one is not worth the money.

    Connectors are not Magicshine compatible (DC 5,5X2,5 instead of DC 5,5X2,1)
    Poorly waterproof
    bad battery
    some second hand plastic mount (it doesnt even fit the light body)
    bad assembly.

    Acctualy all the things that made first Yinding so great are now bad, very bad.

    The only positive thing: the second version got xml2 leds.

    I think only DX sells original Yindings...will that confirm in a few weeks.

  99. #99
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    What makes you think that the DX ones are the original?

  100. #100
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    Quote Originally Posted by bhocewar View Post
    Connectors are not Magicshine compatible (DC 5,5X2,5 instead of DC 5,5X2,1)
    You can make it compatible using this small adapter Black 5.5 x 2.5mm DC Socket to 5.5 x 2.1 DC Plug Adapter for Laptop (2 PCS)

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