Voltage: Charging voltage 21V. Single cell charging voltage 4.225V Current: Continuous discharge current 8-20A Overcharge protection: Overcharge single cell detection voltage 4.225V Overcharge protection delay 1S Overcharged single cell recovery voltage 4.125V Overcharge protection release delay 1mS Over-discharge protection: Over-discharge single cell detection voltage 2.7V Over discharge protection delay 1S Over-discharge single cell recovery voltage 3V Over discharge protection release delay 1S Over current protection: Over current detection voltage 0.1-0.2V Overcurrent detection current 305A Overcurrent detection delay 1S Recovery status: Automatic recovery Short circuit protection: Short circuit detection delay 250uS Short circuit release delay 1S Short-circuit detection voltage 0.5V Recovery status: Automatic recovery after disconnecting the load Temperature protection: Over temperature protection temperature 70°C Over temperature recovery temperature 55°C Consumption: Working state 25uA (25°C) Standby state 6uA (25°C) Internal resistance: The internal resistance of the main discharge circuit is 305mΩ Working temperature: -40°C to 85°C, Relative humidity 75% Storage temperature: -40°C to 125°C, Relative humidity 75% Size: Length x Width 92 x 62 mm Color: Green Material: PC+Metal Package Contents: 1 x Lithium battery protection board Only the above package content, other products are not included Note: Light and different displays may cause the color of the item to vary slightly from the real thing. Measurement allowed error is +/- 1-3cm