Item Type: Battery Protection Board_x000D_ Material: PCB_x000D_ Charging Voltage: 12.6V-13.6V_x000D_ Continuous Discharge Current (Upper Limit): 40A (If the heat dissipation environment is not good, please reduce the load current to use)_x000D_ Continuous Charging Current (Upper Limit): 20A 1CHARGING VOLTAGE: The battery protection board has a charging voltage of 12.6V?13.6V, specially designed for charging 3S batteries. 2FOR ELECTRIC DRILL: Suitable for electric drills with starting current below 80A and power below 135W, requiring multiple power batteries. 3APPLICABLE BATTERY: Suitable for 3.7V nominal voltage, 4.2V full voltage lithium battery, including 18650, 26650, polymer lithium battery. 4AUTOMATIC RECOVERY: The battery charging board has automatic recovery function to maintain a low self consumption current. 5SIMPLE CONNECTION: The battery protection board is balanced, can be connected to the charger and load, and is convenient to connect.1 x Battery Protection BoardTo start the electric drill successfully, you need 3pcs power batteries of 15C?20C, or 6pcs power batteries of 10C?15C (ordinary 18650 cannot start the electric drill).