4S 16.8V 40A lithium battery protection board with auto recovery.
Type: Balanced Version
Application: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650, 26650, polymer lithium battery)
Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use)
Continuous charge current (upper limit): 20A
Charging voltage: 16.8V - 18.1V
Size: 46x60x3.4mm
Note:
1) To successfully start the drill you'll need four 15C-20C power batteries, or eight 10C-15C power batteries (ordinary 18650s can not start the drill !!).
2) Please take care when connecting the batteries 0V, 4.2V, 8.4V, 12.6V, 16.8V do not short circuit.
3) It's recommended to connect a non-polar capacitor (withstand voltage above 25V, capacity 10uF-100uF) to the motor's positive and negative terminals to prevent a reverse spike from the motor breaking the power transistors.
4) Do not mix good and bad batteries, please ensure that they are all the same quality and age, batteries from the same batch are best.
Package includes: 1 x Lithium Battery Protection Board