Hi there. I'm new here, and this is my first time trying to fix my Ilife V7S pro vacuum cleaner battery.
Original battery is this: Click to see
I want to replace the 4 18650 with my INR18650-25R daweikala
I have seen several videos of how to solder, risks of 18650 and other stuff, but after disassembly the pack (4S1P), i found this module, I'm not sure if it's a BMS or just a balancer or just a charger or a mix of everything.
This is the module Click to see
Backside image: Click to see
Also it has: V1, V2, V3, V4, P+, P- and B-
I dont see B+
Could you please guide me how to make the connections? I see just one plug to discharge and to charge.
Thanks infinitely