Parameters:
Charging voltage:16.8v ~ 18.1v
Over Charge voltage:4.25±0.05v
Over Discharge voltage: 2.5v±0.05v
Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current )
Continuous charge current (upper limit): 20A
Internal resistance: Less than 100mΩ
Working temperature:-40 ~ +50Celsius
Storage Temperature:-40 ~ +80Celsius
Size:45 ×60 ×3.4mm/ 1.77 ×2.36 ×0.13″

Features:
1. You can charge and use it at the same time, but it is recommended to fully charge it before using it for safety.
2. With balanced charging function, less loss of battery
3. Comes with built-in recovery function. After over-current protection and short-circuit protection, it can automatically return to normal after troubleshooting.
4 Suitable for electric drills with starting current below 80A and power below 230W.

Attention:
1.When you wiring 0V, 4.2V, 8.4V, 12.6V, 16.8V, plese do it strictly according to the wiring diagram. Do not deliberately make it short circuit.
2.When connecting 4 sets of batteries in series, please ensure that the voltage of each set of batteries is the same. If they are different, please charge each set of batteries separately before using them in series. During the discharge test, the battery set with a faster voltage drop is a bad battery. Please replace it with a good one(Do not mix the good battery and poor battery to use.).
3.When using a brush motor type load, try to connect a non-polar capacitor (withstand voltage above 25V, capacity 10uF-100uF) in parallel with the positive and negative terminals of the motor to prevent the reverse spike voltage generated by the motor from interfering with the protection board or breakdown of the MOS tube.

Package inlcuded:
4x 4S 40A lithium Battery Protection Board
1x Nickel Strip 8mm