I've been running the MagicShine stock batteries, and as we have all seen, it seems one cell goes bad and the whole pack loses it's shiz.
They run Series-parallel 4 cells with a balance circuit between the two parallel stacks. Seems one cell in the parallel pair goes bad.
I've seen Batteryspace.com sell the balancing circuit for like $5. Seems to me you could use two balance circuit boards for 4 cells, or 3 circuits for 6 cells and each cell would be properly regulated and none of the cells would be left for dead. Then, attach the load/charge side of the circuits in parallel.
Any reason why this wouldn't work?
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Thread: Multiple balancers?