October 11, 20169 yr I wired a spare watt meter to show the power going into my battery whilst being charged just to compare with the watts I was using and there is some watts missing somewhere. With the same journey twice and battery charged to full - Power used 3.37aH / 117wH Charge back in 3.5aH /145 wH next Power used 3.12aH / 108wH Charge back in 3.22aH / 132wH Is this normal for an old worn out weak battery? or just a difference between the 2 watt meters? or something else?
October 11, 20169 yr Charging is not 100% efficient. Your results show that charging your battery is about 80% efficient, which is about right. Sent from my HTC 10 using Tapatalk
October 11, 20169 yr You lose a bit through the bleed resistors in the BMS, which bleed the cells down from 4.2v to about 3.17v in order to balance the battery.
October 11, 20169 yr You lose a bit through the bleed resistors in the BMS, which bleed the cells down from 4.2v to about 3.17v in order to balance the battery. That's a typo, I'm sure D8 means 4.17v Sent from my HTC 10 using Tapatalk
October 12, 20169 yr It was a typo, but sometimes the bleed resistors get stuck on, which bleeds the cell down to 0v, and then you need an new battery
October 13, 20169 yr ..the missing watts is really just heat dissipated in all the charging components and the battery itself.
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