3Pcs 4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo

Feature 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 Size 45 55 3 4mm Standard Edition Enhanced 46 60 3 4mm balanced version Product weight 9 3g standard enhanced version 10 3g balanced version Charging voltage 16 8V 18 1VContinuous discharge current upper limit 40A if the cooling environment is not good please reduce the load current use Continuous charge current upper limit 20AEqualization version suitable for starting current below 80A power 135W below the drill ProjectMin Typ Max UnitsConsuming current121824uAOvercharged protection voltage4 24 254 3VBalanced starting voltage4 174 24 23VEquilibrium current95100105mABalanced heating power1 561 721 91WOvercharge recovery voltage4 14 154 2VOver discharge protection voltage2 42 52 6VOvervoltage protection after over discharge protection2 833 2VOvervoltage protection after over discharge protection3 23 53 8VOver discharge recovery voltage2 93 23 3VConduction internal resistance2 533 5mΩOvercurrent protection current C708090AOvercurrent delay time100150200msContinuous operating current04040AContinuous output power0672672WAmbient temperature 402585°C Troubleshooting Fault phenomenonFault check and causeThe solutionUnable to chargeMeasuring the voltage of 4 groups of batteries when one of the battery voltages exceeds 4 25V the protection