4S 40A 14.8V 16.8V Lipo Cell Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board

Description Specifications: 4 string 16.8V 40A lithium battery protection board (comes with recovery function-AUTO Recovery) Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery) Product weight: 9.3g (standard / enhanced version), 10.3g (balanced version) Charging voltage: 16.8V – 18.1V Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use) Continuous charge current (upper limit): 20A Equalisation version: suitable for starting current below 80A, power 135W below the drill. Project Min. Typ. Max. Units Consuming current 12 18 24 uA Overcharged protection voltage 4.2 4.25 4.3 V Balanced starting voltage 4.17 4.2 4.23 V Equilibrium current 95 100 105 mA Balanced heating power 1.56 1.72 1.91 W Overcharge recovery voltage 4.1 4.15 4.2 V Over-discharge protection voltage 2.4 2.5 2.6 V Overvoltage protection after over-discharge protection 2.8 3 3.2 V Overvoltage protection after over-discharge protection 3.2 3.5 3.8 V Over-discharge recovery voltage 2.9 3.2 3.3 V Conduction internal resistance 2.5 3 3.5 mQ Overcurrent protection current C 70 80 90 A Overcurrent delay time 100 150 200 ms Continuous operating current 0 40 40 A Continuous output power 0 672 672 W Ambient temperature -40 25 85 °CTroubleshooting: Fault phenomenon Fault check and cause The solution Unable to charge Measuring the voltage of 4 groups of batteries. If one of the battery voltages exceeds 4.25V, the protection board will activate overcharge protection. Pair the battery pack well, do not mix the good battery and the bad battery. Screenshot Packing List: 1 x 4S 40A 14.8V 16.8V Lipo Cell Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board