I have an ewheels.com fast 5A charger, the one with voltage and current readouts, as well as switches for 80/90/100% charge and 1/2/3/4/5A. It's a 48V charger (54.6V max) I use to charge my e-scooter battery. I've encountered some strange behavior that I don't understand. I'm afraid it may lead to a misbalanced battery over time.
Near the end of the CV phase, it stops charging at about 0.5A current, and voltage drops by 0.2V from 54.6 to 54.4V. This is different from how it used to work sev
I don't like that batteries are "black boxes" - we don't know what's going on inside, we only have one piece of info: total voltage. So, for my custom 14s battery for my escooter, I bought this 16-pin connector:
that will be connected to individual parallels, so I can measure voltage of each parallel at any time without disassembly, and balance manually, if needed. If this idea proves usefull, I'll install a similar connector (22-pin) on my EUC, too.