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  1. #1
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    3S1P lipo or 4S1P for 2 XM-L ? cant decide ....

    Not the greatest luck today...I started to build my first LED hammond with 2 XM-L .....
    I ordered Imax B6 charger and a 3S1P from hobbyking.... got my 3S in about 7 days one month later (today) i recieved my Imax B6 charger Tried to charge the lipo and no luck... Lipo got ruined and voltage dropped... So I need to order another lipo.. cant decide on 3S or 4s 5000mah lipo pack....... What do you guys think ? Thank you......

  2. #2
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    What driver are you running?
    Look, whatever happens, don't fight the mountain.

  3. #3
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    I will be using a H6flex....forgot to mention sorry.....

  4. #4
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    Since it is a buck driver I would run the 3s 11.1v battery.
    How hard do you plan on driving the XM-Ls?
    Gonna run them at full whack 3a?
    Look, whatever happens, don't fight the mountain.

  5. #5
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    any idea why the original pack was ruined? Might be worth trying to figure that out first before buying any new packs...

  6. #6
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    @matthemuppet the lipo pack voltage droped below 9volts... I never used it...maybe because it was was stored for a month ...not sure...

    @savagemann well I was planning to run at full whack 3amps but now I think I'll run on a lower level uphill and full whack downhill.... I would love to get at least a little over two hours of run time ... Or otherwise I'm going to need two lipo packs ...more weight

  7. #7
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    It's always good to bump down to lower settings for climbing. Helps keep the light head cool and conserves battery power.
    I usually run low settings for fireroad climbs, medium for flats and technical climbs, and pop it on high for only the fast descents.
    Below I have linked to the LED Runtime calculator.
    You can play with the current to see how it effects runtime.
    It's funny how even a 10% drop in current to the LEDs will dramatically increase runtime.
    I try to run my lights a tad below the rated max to help extend runtime.
    For instance, my bar light is a dual 3up XPG and I run it at 1000mAh for the highest setting.
    My helmet light is a dual XPG and I have it set to 1500mAh max, but only run it on that setting for less than 10 minutes each ride.
    Only on descents where speeds are reaching or exceeding 30mph.

    http://www.kenworster.com/ledcalc/
    Look, whatever happens, don't fight the mountain.

  8. #8
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    Quote Originally Posted by aztlan805
    @matthemuppet the lipo pack voltage droped below 9volts... I never used it...maybe because it was was stored for a month ...not sure...
    If all you did was store it for a month, then there is something wrong with the battery. You should return it and get a replacement. The self discharge rate on lipo's is extremely low and you should be able to go for years without any problem.

  9. #9
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    ^^^^ What he said.
    Look, whatever happens, don't fight the mountain.

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