Standard version:suitable for starting current below 60A, 100W below the drill.(Not balanced function)Enhanced version:for starting current below 80A, 135W below the drill.(Not balanced function)Balanced version:suitable for starting current below 80A, 220W below the drill.(with balance)Note 1:The successful start of the drill requires three 15C-20C battery,or six 10C-15C battery(ordinary 18650 can not start the drill ).Note 2:strictly according to map wiring 0V,42V,84V,126V,168V,do not deliberately short circuit.Note 3:When the load of the brush motor is used,try to connect a non- capacitor(withstand voltage above 25V,capacity 10uF-100uF)to the motor's positive and negative terminals to prevent the reverse spike from the motorBreak the MOS tube.Note 4:4 groups of batteries in series,please that the voltage of each group of batteries,if not the same,please fill each battery separately and then use in seriesThe The Discharge test,the voltage drop faster battery that group is poor battery.Model Number:Lithium Battery 18650 Charger PCB BMS Protection BoardCondition:Newis customized:YesType:Voltage RegulatorApplication:For Drill MotorBalance Current:100mA4S 168V 40A lithium battery protection boardScope:Nominal voltage of 36V,37V lithium battery(including 18650,26650,polymer lithium battery)Charging voltage:168V-181VContinuous discharge current(upper limit):40A(if the cooling environment is not good,please reduce the load current use)Continuous charge current(upper limit):20AColor:greenMaterial:plastic+metalPackage Contents:1* 4S 40A Li-ion Lithium Battery Protection BoardOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.