Li-Ion 18650 battery charger module for 4 cells or 4 packets (4S) 16.8V with protection Parameters: Maximum continuous operating current 40 A Instantaneous maximum 80 A. Maximum battery charging current 20 A Supports 4S batteries: Li-ion, LiCoO2, LiMn2O4, Li (NiCoMn) O2, Lipo Maximum balancing current: 100 mA Short circuit detection time: 100 us Overcurrent overload detection time: 500 us Detectable cell discharge voltage: 4.08V +/- 0.1V Overcharge detection voltage per cell: 4.2V +/- 0.05V Battery detection voltage per cell: above 2.55V +/- 0.08V End discharge voltage per cell: 3.00 V +/- 0.1 V Working temperature: -30 - +80 degrees C Dimensions 55x45x4 mm System life 50,000 h New and used cells should not be mixed. It is best to use cells with the same voltage, capacity and internal resistance parameters. https://elecena.pl/product/22606240/4s-40a-16-8v-bms-li-ion-charging-balancer-protection-module 2023-02-22 https://elecena.pl/product/22606240/4s-40a-16-8v-bms-li-ion-charging-balancer-protection-module 2025-10-29