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Originally Posted by A4DTM
which keeps seperate packs in balance w/ eachother? in series or parallel? ie, if I run these packs in paralell, can I charge them in parallel? will the balancer work like this? sorry, never used my lipos :o
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If you have two 5S1P packs and want to run them in parallel, you should prep them first by fully balance-charging both packs individually. This means taking one pack, hooking up a balancer capable of balancing while charging (active balancer), then charging the pack fully. Repeat with the second pack.
The balancer will only work on 1P of batteries at a time. In a 2P (or more P) pack, you need two or more balancer leads (taps); one for each P.
Once both packs are fully balance-charged, you can use them in parallel in the vehicle and charge them in parallel. I would, for safety's sake, re-balance them (using the method from above) after about 5-10 charges. This is really just to make sure they stay in balance, which will help prevent damage from over-discharge or over-charging.
I actually have two new 4S1P 4000mah TrueRC 10C packs that I will be running in parallel, but it'll be a few weeks before I can get this done so I can't offer any pics or results at this point. I will balance-charge both packs fully, then wire them in parallel in the vehicle for 4S2P 8000mah. To charge them, I'll leave them in parallel and charge on my ICE at up to 8A (1C of 8000mah).