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Model Forum / Radio Controlled / Air Models / August 2008Using Durcell AA NiMh 2650 mAh batteries for RC battery packs
I read yesterday that these batteries can handle a constant 10 amp draw pretty well. Actually I saw a graph that showed their voltage drop curve posted on this group, I think it was a 2002 post. I want to make a battery pack for my GWS slow stick from these. I plan to use the simple conventional (spring on the negative end) battery holder. Does anyone see any problems with this idea? > I read yesterday that these batteries can handle a constant > 10 amp draw pretty well. Actually I saw a graph that showed [quoted text clipped - 3 lines] > (spring on the negative end) battery holder. Does anyone see > any problems with this idea? No problem as long as you remove the batteries from the holder for charging. If you leave the batteries in the holder to charge, and do this cycle of charging and using them, corrosion builds up at the connections between the batteries and the holder. You can then have intermittent power and even lose power at an inopportune time. The act of removing and inserting the batteries into and out of the holder cleans the contacts somewhat. | I read yesterday that these batteries can handle a constant | 10 amp draw pretty well. Actually I saw a graph that showed [quoted text clipped - 3 lines] | (spring on the negative end) battery holder. Does anyone see | any problems with this idea? Those holders aren't meant for high current. They'll probably waste a lot of power, perhaps stop working in the middle of a flight. You'd be better off soldering it into a pack. I've never gotten high currents out of the high capacity commercial NiMH AA batteries. But 10A is only 4C for a 2650 mAh pack, so maybe it's not really that high. I doubt the 2650 mAH AA cells existed in 2002, so whatever you read probably either wasn't from 2002 or mentioned a different battery.  SignatureDoug McLaren, dougmc@frenzied.us Never forget: 2 + 2 = 5 for extremely large values of 2. |
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