3S 20A 18650 Li-ion Lithium Battery Charger PCB BMS Protection Board
 
Scope of application: nominal voltage of 3.6V, 3.7V lithium battery (including 18650, 26650, polymer lithium battery)
Product size: 59*20*3.4mm
Charging voltage: 12.6V
Continuous discharge current (upper limit) : 20A (if the heat dissipation environment is not good, please reduce the load current use)
Continuous charging current (upper limit) : 10A
 
Note 1: wiring 0V, 4.2V, 8.4V and 12.6V strictly according to the figure, do not short-circuit intentionally.
 
Note 2: When carrying loads of brush motor, a non-polar capacitor (voltage withstand 25V or more, capacity 10UF-100UF) must be connected in parallel at the positive and negative terminals of the motor to prevent the reverse peak voltage generated by the motor from interfering with the protection plate or breaking down the MOS tube.
 
Note 3: When three batteries are in series, please ensure that the voltage of each battery is the same. If not, please fill each battery separately and then use it in series.In the discharge test, the group of batteries whose voltage drops faster is the poor battery.
 
For some customers with poor electronic basis: do not mix good batteries and poor batteries together!
The capacity/internal resistance of the 3 batteries is as close as possible!
2 good batteries +1 bad batteries =3 bad batteries.