Feature: Adopting a 5 series lithium battery-dedicated IC as a processor. Real-time detection of battery voltage, charge and discharge current, and ambient temperature. Overcharge, overdischarge, discharge overcurrent, short circuit, charge overcurrent, temperature protection, etc. High-quality electronic components the stable and reliable performance of the lithium battery protection board. Widely used on battery packs for tools using 18650 lithium batteries.Item Type Lithium Battery Protection Board Model XL-MH99V5 2(or MH99V51-S)Number of Series 5 Series. Voltage Charging Voltage 21V. Single Charge Voltage 4.225VCurrent Continuous Discharge Current 8-20A. Overcharge Protection Overcharged Single Section Detection Voltage 4.225VOvercharge Protection Delay 1S. Overcharged Single Section Recovery Voltage 4.125V. Overcharge Protection Release Delay 1mSOverdischarge Protection Over-Discharge Single-Section Detection Voltage 2.7VColor: GreenMaterial: PC+MetalOver-Discharge Protection Delay1SOver-Discharge Single-Section Recovery Voltage3VOver-Discharge Protection Release Delay1SOvercurrent ProtectionOvercurrent Detection Voltage0.1-0.2VOvercurrent Detection Current305AOvercurrent Detection Delay1SRecovery StatusAutomatic RecoveryShort Circuit ProtectionWith Or Without Short Circuit ProtectionWith Short Circuit ProtectionShort Circuit Detection Delay250uSShort Circuit Release Delay1SShort Circuit Detection Voltage0.5VRecovery StatusAutomatic Recovery After Disconnecting LoadTemperature ProtectionOver Temperature Protection Temperature705Over TemperatureRecovery Temperature555 ConsumptionWorking Status25uA (25)Dormant State6uA(25)Internal ResistanceDischarge Loop Internal Resistance305mSizeLength x WidthApprox. 80 x 63.5mm / 3.1 x 2.5inTemperature protectionWorking temperature -40C-85C Relative humidity75%Storage temperature-40C-125C Relative humidity75%Package Contents:2 x Protection Circuit BoardOnly the above package content, other products are not included.Note: Light reflection 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.