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Anyone?

Sorry if i sounded like I'm charging at 500ma but I'm not. I was charging at 15amps. But slowly as the voltage of the battery rose the amps got lower and at 4.05 volts its stuck at 0.5amps. The voltage should rise to 4.20 volts but remains stuck there even after several hours. Why doesn't it...

I'm planning to make a backup power system for some projects which runs on 5v. I have 12 Lipo batteries of 10Ah each. All the cells are brand new with <5 charge/discharge cycles each. So I've attached all of them in parallel (1S12P; 3.7v, 120Ah) and used a boost converter to get 5v out. Now...