1. Voltage charging voltage 21V. Single cell charging voltage 4.225V 2. Current Continuous discharge current 8-20A 3. 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 30±5A Overcurrent detection delay 1S Recovery status Automatic recovery Short circuit protection Is there 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±5℃ Over temperature recovery temperature 55±5℃ Power consumption working state 25uA (25℃) Sleep state 6uA(25℃) Internal resistance The internal resistance of the main discharge circuit is 30±5mΩ Temperature protection Working temperature -40℃-85℃ Relative humidity ≤75% Storage temperature -40℃-125℃ 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 in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.