4S 40A 16.8V BMS Li-ion Charging Balancer & Protection Module

Li-Ion 18650 battery charger module for 4 cells or 4 packets (4S) 16.8V with protection

Parameters:
Maximum continuous operating current 40 A
Instantaneous maximum 80 A.
Maximum battery charging current 20 A
Supports 4S batteries: Li-ion, LiCoO2, LiMn2O4, Li (NiCoMn) O2, Lipo
Maximum balancing current: 100 mA
Short circuit detection time: 100 us
Overcurrent overload detection time: 500 us
Detectable cell discharge voltage: 4.08V +/- 0.1V
Overcharge detection voltage per cell: 4.2V +/- 0.05V
Battery detection voltage per cell: above 2.55V +/- 0.08V
End discharge voltage per cell: 3.00 V +/- 0.1 V
Working temperature: -30 - +80 degrees C
Dimensions 55x45x4 mm
System life 50,000 h

New and used cells should not be mixed.

It is best to use cells with the same voltage, capacity and internal resistance parameters.