ITEM NAME:4S 40A 18650 Li-Ion Lithium Battery Charger BMS Board PCB Protection Module Q2G5 4S 40A 18650 Li-Ion Lithium Battery Charger BMS Board PCB Protection Module Q2G5.Model Number: 40A. Dissipation Power: 1. Application: Alarm. Equalization version: suitable for starting current below 80A, power 135W below the drill.