4S 40A Bms With Balance

To successfully start a load for instance an electric drill, you need 4 15C-20C power
batteries, or 8 10C-15C power batteries (ordinary 18650 cannot start the electric drill).
Note 2: Wire OV, 4.2V, 8.4V, 12.6V, 16.8V strictly according to the diagram,
A short circuit is not allowed.
When on a load such as a brush motor, try to place it directly in front of the motor.
Connect a non-polar capacitor (that can withstand voltage above 25V, value 10uF-100uF) in parallel to the
negative terminal to prevent the reverse peak voltage generated by the motor from interfering with the BMS or breaking down the MOSFETs.
When connecting 4 groups of batteries in series, please ensure that the voltage of each
group of batteries is the same. If not, please fully charge each group of batteries separately before using
them in series. During the discharge test, the battery group whose voltage drops faster is a bad battery.
For some customers with poor electronic knowledge: balanced charging is only an
auxiliary function. Try not to mix good batteries with bad batteries and feel that it will balance! The closer the capacity, and
internal resistance of the four sets of the batteries, the better. Three good batteries plus one bad battery = the effect of four bad batteries.

Package contains
1 x 4s 40A Bms