BMS 3S 4S 5S 18650 lithium battery charging protection board module 25A 12.6V 16.8V 21V overcharge discharge overcurrent protect
USD 1.80USD 2.05
BMS 3S 4S 5S 18650 lithium battery charging protection board module 25A 12.6V 16.8V 21V overcharge discharge overcurrent protect