ITEM NAME:3S 40A Li-ion Lithium Battery Charger Cell Module PCB BMS Protection Board Product Description Description: Descriptions: Scope of application: For lithium batteries with nominal voltage of 3.7V and full voltage of 4.2V, including 18650, 26650 and polymer lithium batteries. Product Size: 41*55*3.4mm/1.61*2.17*0.13" (Enhanced Edition) Product Weight: 14g (Enhanced Edition) Charging Voltage: 12.6V-13.6V Continuous discharge current (upper limit): 40A (if the heat dissipation environment is not good, please reduce the use of load current) Continuous charging current (upper limit): 20A It is suitable for electric drills with starting current below 80A and power below 170W. Specifications: Electrical parameters Items              Minimum  Typical  Maximum  Unit  Remarks Consumption current   12       18      24       uA Overcharge protection voltage 4.2   4.25    4.3       V Overcharge recovery voltage 4.1    4.15    4.2       V Over-discharge protection voltage 2.4     2.5  2.6      V Return Voltage           2.8    3   3.2    V 1C Discharge after Over-discharge Protection 3.2  3.5 3.8  V  2C Discharge Over-discharge recovery voltage 2.9    3.2  3.3          V On-resistance       2.5      3    3.5   mÃŽ © Overcurrent protection current   70   80    90            A Overcurrent delay time      100      150     200      Ms Resistive Load with Continuous Working Current 0  40   40   A Continuous output power   0       504    504    W     resistive load Ambient temperature   - 40       25     85     ℃ Common faults and treatment methods: Fault Phenomenon Fault Check and Reason Handling Method It is impossible to measure the voltage of three batteries by charging. If the voltage of one batteries exceeds 4.25V or so, the protection board will start over-charg.Match the batteries well, and don't mix the good batteries with the bad ones. Continuous output power 0 504 504 W resistive load. Resistive Load with Continuous Working Current 0 40 40 A.
