I am having trouble deciding weather 20, 21, or 22 batteries are the right
series string for a 72vdc battery. for a 3.7 volt battery 20 seems to be
right. However I have A123 batteries and nominal is 3.3vdc. Videos on YouTube
are inconclusive. Sellers details not complete. Any advice appreciated. I'd
like to run 1 or two strings for a small ebike battery. The controller only
draws 40amps. Lawrence Rhodes
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