Features: The protection board is for 7 series 18650 li-ion 3.6V/3.7V batteries.Stable various protective functions for charging and discharging, such as accurate overcharge protection, over-discharge protection, over current protection and short circuit protection.Batteries core hardware balanced processing, proper balanced current, reasonable balanced heat emitting, does not affect performance of battery pack.It has aluminum sheet that would enhance heat dissipation for MOS tube, and extend the service life of MOS tube.Low quiescent power consumption, it can save energy.Specification: MinimumTypical MaximumUnitNoteWorkingVoltage19.629.75VCircuit normall working rangeQuiescentCurrent2050ASingle battery voltage 3.6VOperatingTemperature-20+70Normall operating temperaturerangeRelativeHumidity90%No condensationStorageTemperature-40+85Humidity is less than 90%, nocondensationAltitude4000MChargingVoltage29.75VCC-CVFunctionTest ItemSymbolTest ConditionMinimumTypicalMaximumUnitOver Charge ProtectionVoltageVc1At charge off4.2004.2504.300VDelayTimeTc1/1010001700mSRelieveVoltageVc2/4.1504.1904.240VChargingCurrentNormalIoc/20ABalancingFunctionStart Voltage/4.1504.2004.250VBalancingCurrent/2035mAOver Discharge ProtectionVoltageVd1At discharge off2.7002.8002.900VDelayTimeTd1/10200500mSRelieveVoltageVd2/2.9003.0003.100VRecoveryCondition//Disconnecting loadOverCurrent PortecionOver Current 1 ProtectionCurrentIoc160100AOverCurrent 1 Protection Delay TimeToc120200mSDischargeOver Current RelievingOver Current Protecion RecoveryCondition//Disconnecting loadDischargeCurrentMax. Continuous DischargeCurrentIoc---20AShortCircuit ProtectionDelay TimeTshort300600SRecovery//Disconnecting loadInternalResistanceDischarge Circuit InternalResistance(m)Ron1//20mRSelfPower ConsumptionWorking ModeIcc1/2050ASize: 65*33*7mm / 2.56*1.3*0.27"Wire Length: 350mm / 13.77"Package list: 1 x Protection BoardNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..