DIY 4S Lithium Battery Pack With BMS : 6 Steps
Once our battery is soldered together, we need to measure the voltages across the series cells with a multimeter. You should have 14.8 volts for battery positive, 3.7V volts, 7.4V volts, and 11.1 volts. There are 5 connections for a 4S balance plug: one for battery positive or cell #4, one for negative, cell #1, cell #2, and cell #3.
Contact