Feature:1. CHARGING VOLTAGE: The battery protection board has a charging voltage of 12.6V13.6V, specially designed for charging 3S batteries.2. FOR ELECTRIC DRILL: Suitable for electric drills with starting current below 80A and power below 135W, requiring multiple power batteries.3. APPLICABLE BATTERY: Suitable for 3.7V nominal voltage, 4.2V full voltage lithium battery, including 18650, 26650, polymer lithium battery.4. AUTOMATIC RECOVERY: The battery charging board has automatic recovery function to maintain a low self consumption current.5. SIMPLE CONNECTION: The battery protection board is balanced, can be connected to the charger and load, and is convenient to connect.Specification:Item Type: Battery Protection BoardMaterial: PCBContinuous Discharge Current (Upper Limit): 40A (If the heat dissipation environment is not good, please reduce the load current to use)Continuous Charging Current (Upper Limit): 20A.Package List:1 x Battery Protection BoardNote:To start the electric drill successfully, you need 3pcs power batteries of 15C20C, or 6pcs power batteries of 10C15C (ordinary 18650 cannot start the electric drill).