Ujjdwiurgh 2PCS 3S 40A for Screwdriver 12V Li-Ion 18650 Battery Protection Board Pcm with Balance Liion Battery Cell Module

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 series. Strictly according to map wiring 0V, 4.2V, 8.4V, 12.6V, 16.8V, do not deliberately short circuit. When the load of the brush motor is used, try to connect a non- capacitor (with stand voltage above 25V, capacity 10uF-100uF) to the motor's positive and negative terminals to prevent the reverse spike from the motor. Break the MOS tube. The successful of the drill requires three 15C-20C power battery, or six 10C-15C power battery (ordinary 18650 can not the drill). The Discharge test, the voltage drop faster battery that group is poor battery.