I'm new here, and this is my first time trying to fix my Ilife V7S pro vacuum cleaner battery.
The original battery is this:
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:
As you can see, it has: V1, V2, V3, V4, P+, P- and B-
but 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 Bruce. However I have another doubt. I included an image of what I understood the squematic is, but even after I joined all the wires, in the output of the module (P- and P+), i'm not getting the 14.8v only about 5v Do I have to connect the (-) and (+) (from the cells in serie that gives 14.8v) to the P- and P+? The terminals from the module P- and P+ should be 14.8. The one with thick wires i have from the battery in the image. BTW, is there a module that not only protects the batteries, but also balance the charge / discharge two in one. How should I look for it? Thanks.