XL-MH9955 5 Series Lithium Battery Protection Circuit Board 21V Power Tools Lithium Drill 18650 Li ion Battery Module(MH9955 ) _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ XL-MH9955 5 Series Lithium Battery Protection Circuit Board 21V Power Tools Lithium Drill 18650 Li ion Battery Module _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Feature: _x000D_ _x000D_ 1. Adopting mature 5 series dedicated lithium battery protection chip for central control, featuring high integration and high sensitivity._x000D_ 2. By detecting the charge and discharge current, voltage and ambient temperature of each battery, it can realize the protection of overcharge, over discharge, discharge over current, short circuit, charge over current, temperature and other real-time protection._x000D_ 3. The adjustment of the parameters can also be realized by an external circuit._x000D_ 4. Widely used on battery packs for power tools using 18650 lithium batteries._x000D_ 5. High-quality electronic components ensure the stable and reliable performance of the lithium battery protection board._x000D_ _x000D_ _x000D_ Specification: _x000D_ _x000D_ Item TypeLithium Battery Protection Circuit Board_x000D_ ModelXL-MH9955MH9955_x000D_ Number of Series5 Series_x000D_ VoltageCharging Voltage21V _x000D_ Single Charge Voltage3.85/4.25V_x000D_ CurrentContinuous Discharge Current8-20A_x000D_ Overcharge ProtectionOvercharged Single Section Detection Voltage3.85-4.25V_x000D_ Overcharge Protection Delay1S_x000D_ Overcharged Single Section Recovery Voltage3.75-4.13V_x000D_ Overdischarge ProtectionOver-Discharge Single-Section Detection Voltage2-2.8V_x000D_ Over-Discharge Protection Delay1S_x000D_ Over-Discharge Single-Section Recovery Voltage2.5-3.0V_x000D_ Over-Discharge Protection Release Delay10020mS_x000D_ Overcurrent ProtectionOvercurrent Detection Voltage0.1-0.4V_x000D_ Overcurrent Detection Current305A_x000D_ Overcurrent Detection Delay1S_x000D_ Recovery StatusAutomatic Recovery_x000D_ Short Circuit ProtectionWith Or Without Short Circuit ProtectionWith Short Circuit Protection_x000D_ Short Circuit Detection Delay250uS_x000D_ Short Circuit Release Delay1S_x000D_ Short Circuit Detection Voltage0.8V_x000D_ Recovery StatusAutomatic Recovery After Disconnecting Load_x000D_ Temperature ProtectionOver Temperature Protection Temperature705_x000D_ Over Temperature Recovery Temperature555_x000D_ Power ConsumptionWorking Status25uA(25)_x000D_ Dormant State6uA(25)_x000D_ Internal ResistanceDischarge Loop Internal Resistance305m_x000D_ SizeLength x WidthApprox. 69 x 49mm / 2.7 x 1.9in_x000D_ Temperature protectionWorking temperature-40C-85C Relative humidity75%_x000D_ Storage temperature-40C-125C Relative humidity75%_x000D_ _x000D_ _x000D_ Package List: _x000D_ _x000D_ 1 x Lithium Battery Protection Circuit Board_x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_