1. Voltage charging voltage 21V. Single cell charging voltage 4.225V2. Current Continuous discharge current 8-20A3. Overcharge protection, overcharge single cell detection voltage 4.225VOvercharge protection delay 1SOvercharged single cell recovery voltage 4.125V. Overcharge protection release delay 1mSOver-discharge protection, over-discharge single cell detection voltage 2.7VOver discharge protection delay 1SOver-discharge single cell recovery voltage 3VOver discharge protection release delay 1SOver current protection Over current detection voltage 0.1-0.2VOvercurrent detection current 305AOvercurrent detection delay 1SRecovery status Automatic recoveryShort circuit protection Is there short circuit protection?Short circuit detection delay 250uSShort circuit release delay 1SShort-circuit detection voltage 0.5VRecovery status Automatic recovery after disconnecting the loadTemperature protection Over temperature protection temperature 705Over temperature recovery temperature 555 consumption working state 25uA (25) state 6uA(25)Internal resistance The internal resistance of the main discharge circuit is 305mTemperature protection Working temperature -40-85 Relative humidity 75% temperature -40-125 Relative humidity 75%Size Length x Width 92 x 62 (mm)Color: greenMaterial: PC+MetalPackage Contents:1 x Lithium battery protection boardOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.