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charging high voltage packs?

charging high voltage packs?

Old 09-08-2007, 02:49 PM
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Default charging high voltage packs?

i heard somewhere that most silver can's are rated up to 24 volts, som i'm building a 20 cell AAA pack. only problem is, how the hell do i charge it? i have a 2 channel bench top power supply but each channel only goes up to 16 volt. that would mean i have to run both channels in series at 15 volts 250mah (500mah for 2 1/2 hours should charge the pack nicely). can you get chargers that go that high? the only proper cahrger i have is a drill battery charger...
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Old 09-09-2007, 02:27 AM
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Ur gonna make ur AAA batteries go kapoooffff........
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Old 09-09-2007, 06:07 AM
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i have experience in batteries exploding. these'll be fine!
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Old 09-09-2007, 08:10 AM
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Put taps on it and charge it as 4 5 cell packs.
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Old 09-09-2007, 05:55 PM
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I'm not really sure, but based on my experience, you might still be better off using sub c batteries, aaa batteries tends to drop their voltage too much everytime you would pull the trigger because of the amp draw that they are not really designed for, using a voltmeter on idle they might rate at around 1.30 average voltage, but when you pull the trigger they can go as far down as .70 - .90,,, with regards to using 20 aaa batts to supply the power might be a different result though, i still suggest that you use 10- 12 sub c instead.

anyway tell us what happens bro, cheers!!!
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Old 09-09-2007, 08:23 PM
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+1 on the voltage drop. Generally, the long skinny type of cells don't like high amp rates for discharge or charging. I'm still curious to see what happens though. If you go about trying something else later on I would recommend going with a bunch of 2/3A cells. They will still handle a fairly heavy amp load and are still quite light.
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Old 09-10-2007, 10:56 AM
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well, in the end i decided to get some nitro instead. but i will try the pack at some point. i'm using AAA's because i can fit exactley 20 in the battery bay on my 1/14 rally. (and the stock pack is 600mah and wearing out. it stinks of electrolyte whenever i charge it)
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