Features: _x005F_x000D_ The protection board is for 7 series 18650 li-ion 3.6V/3.7V batteries. _x005F_x000D_ Stable various protective functions for charging and discharging, such as accurate overcharge protection, over-discharge protection, over current protection and short circuit protection. _x005F_x000D_ Batteries core hardware balanced processing, proper balanced current, reasonable balanced heat emitting, does not affect performance of battery pack. _x005F_x000D_ It has aluminum sheet that would enhance heat dissipation for MOS tube, and extend the service life of MOS tube. _x005F_x000D_ Low quiescent power consumption, it can save energy. _x005F_x000D_ _x005F_x000D_ _x005F_x000D_ Specification: _x005F_x000D_ _x005F_x000D_ Minimum Typical Maximum Unit Note _x005F_x000D_ Working Voltage 19.6 _x005F_x000D_ 29.75 V Circuit normall working range _x005F_x000D_ Quiescent Current _x005F_x000D_ 20 50 A Single battery voltage 3.6V _x005F_x000D_ Operating Temperature -20 _x005F_x000D_ +70 Normall operating temperature range _x005F_x000D_ Relative Humidity _x005F_x000D_ _x005F_x000D_ 90% _x005F_x000D_ No condensation _x005F_x000D_ Storage Temperature -40 _x005F_x000D_ +85 Humidity is less than 90%, no condensation _x005F_x000D_ Altitude _x005F_x000D_ _x005F_x000D_ 4000 M _x005F_x000D_ _x005F_x000D_ Charging Voltage _x005F_x000D_ _x005F_x000D_ 29.75 V CC-CV _x005F_x000D_ Function Test Item Symbol Test Condition Minimum Typical Maximum Unit _x005F_x000D_ Over Charge Protection Voltage Vc1 At charge off 4.200 4.250 4.300 V _x005F_x000D_ Delay Time Tc1 / 10 1000 1700 mS _x005F_x000D_ Relieve Voltage Vc2 / 4.150 4.190 4.240 V _x005F_x000D_ Charging Current Normal Ioc / _x005F_x000D_ _x005F_x000D_ 20 A _x005F_x000D_ Balancing Function Start Voltage _x005F_x000D_ / 4.150 4.200 4.250 V _x005F_x000D_ Balancing Current _x005F_x000D_ / 20 _x005F_x000D_ 35 mA _x005F_x000D_ Over Discharge Protection Voltage Vd1 At discharge off 2.700 2.800 2.900 V _x005F_x000D_ Delay Time Td1 / 10 200 500 mS _x005F_x000D_ Relieve Voltage Vd2 / 2.900 3.000 3.100 V _x005F_x000D_ Recovery Condition / / Disconnecting load _x005F_x000D_ Over Current Portecion Over Current 1 Protection Current Ioc1 _x005F_x000D_ 60 _x005F_x000D_ 100 A _x005F_x000D_ Over Current 1 Protection Delay Time Toc1 _x005F_x000D_ 20 _x005F_x000D_ 200 mS _x005F_x000D_ Discharge Over Current Relieving Over Current Protecion Recovery Condition / / Disconnecting load _x005F_x000D_ Discharge Current Max. Continuous Discharge Current Ioc - - - 20 A _x005F_x000D_ Short Circuit Protection Delay Time Tshort _x005F_x000D_ _x005F_x000D_ 300 600 S _x005F_x000D_ _x005F_x000D_ Recovery / / Disconnecting load _x005F_x000D_ Internal Resistance Discharge Circuit Internal Resistance(m) Ron1 _x005F_x000D_ / / 20 mR _x005F_x000D_ Self Power Consumption Working Mode Icc1 _x005F_x000D_ / 20 50 A _x005F_x000D_ _x005F_x000D_ Size: 65*33*7mm / 2.56*1.3*0.27" _x005F_x000D_ Wire Length: 350mm / 13.77" _x005F_x000D_ _x005F_x000D_ _x005F_x000D_ Package list: _x005F_x000D_ 1 x Protection Board _x005F_x000D_ _x005F_x000D_ _x005F_x000D_ Note:_x005F_x000D_ 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.