Scheda di protezione PCB 4S 20A 18650 14,8V 16,8V batteria litio agli ioni di litio BMS PCM W
BMS solder instruction 4S LI-ION BMS Specifications 4 series 18650 battery 16.8V 16V 14.8V. 1PC Protection PCB Board. B1 the connect point between battery 1 and battery 2. B3 Connect the point between battery 3 and battery 4.