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Will: I am trying to understand . Iam looking at a adv battery 400 ah norm cap 2c. Specs. States to (charge) 400amps for 7 hrs where are we to get 400 amps I 7hrs?? what I'm I not understanding?

I have 4 new 200 ah 3c 3.2 v rated cap 200 ah at 2c DC rate each cell thay are new cells from alliex. ex bls store china each cel is sitting on 3.2 volts l am new to lithium lpo4 my question is in keeping with the recomend rate of discharge and using a inverter that will shut down at...