The norm in the road-EV world, back when conversions ruled the roost, was
to "buddy-pair" 6-volt or 12-volt modules (connect them in parallel), then
connect the pairs in series.
I'm pretty sure that that's how s/p lithium batteries are made, too, though
it's been a while since I've cut open a laptop battery.
What you're doing sounds like the opposite - connecting cells in 2 or 3
series strings, then connecting the strings in parallel.
David Roden - Akron, Ohio, USA
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