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Originally Posted by MetalMan
squee, there's no problem with lots of cells in a Lipo pack... I have 2 separate packs each with 12 cells...
And about parallel being more expensive, it doesn't work like that. You pay for the number of cells that are in the pack. For example, a 3s2p would cost the same as a 2s3p because they both have 6 cells.
Chaos, did you happen to look at the specs on that 5s3p 6600mah pack (that uses 2200mah cells)? It's 35mm wide x 96mm long x 126mm TALL. You'd need some special way to mount that... Those 2200mah cells are best suited for airplanes because they are 35mm wide and only 96mm long. Normal car batteries (6cell NiMh) occupy ~46mm wide x 135mm long.
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What I meant when I said its usually more expensive to run packs in parallel, I ment like to get 2 5S1P packs and wire them in parallel for more mah. It's usually cheaper to just get different packs with a higher mah and put them in series. About the number of cells, its not that theres a problem with 15 cells in 1 pack, its just the weight. I just don't like the added weight as with most people.