18650 Lithium Battery Protection Board BMS 3S 40A with Balance 3 Series 40A 11.1V 12.6V for Drill Motor Lipo Cell Module
 
CMB ( Charging manage Board ) integrates DC smart charging ( CC/CV) function and protection circuit together on one board, so that you can build a Li-Ion battery pack with full protection, and charge battery pack by a conventional DC power supply or adaptor, make Li-Ion battery pack more compact and portable.
 
Product Description
The successful start of the drill requires three 15C-20C power battery, or six 10C-15C power battery (ordinary 18650 can not start the drill).
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-polar 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.

Groups of batteries in series, please ensure that the voltage of each group of batteries,if not the same, please fill each battery separately and then use in series.
The Discharge test, the voltage drop faster battery that group is poor battery.
Product Description:3S 12.6V 40A lithium battery protection board with Balance for Screwdriver
Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery)
Charging voltage: 12.6V-13.6V
Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use)
Continuous charge current (upper limit): 20A.
Name: Protection Board
Colour: green
Material: PCB