3 Strings 12.6V 20A 18650 lithium battery protection board can start electric drill 20A current BMS

3-cell 12.6V 20A lithium battery protection board (with built-in recovery function - AUTO Recovery)

Scope of application: Lithium batteries with a nominal voltage of 3.6V and 3.7V (including 18650, 26650, and polymer lithium batteries).

Product dimensions: 59*20*3.4mm

Product weight: 4.3g

Charging voltage: 12.6V 13.0V

Continuous discharge current (upper limit): 20A (If the heat dissipation environment is poor, please reduce the load current).

Continuous charging current (upper limit): 10A

Standard version: Suitable for electric drills with starting current below 40A and power below 65W.

Enhanced version: Suitable for electric drills with a starting current of less than 60A and a power of less than 100W.

Note 1: Successfully starting the electric drill requires 3 15C-20C power batteries or 6 100-150C power batteries (ordinary 18650 batteries cannot start the electric drill!!!).

Note 2: Strictly follow the wiring diagram for 0V, 4.2V, 8.4V, and 12.6V. Do not intentionally short-circuit.

Note 3: When dealing with loads such as brushed motors, a non-polarized capacitor (with a withstand voltage of 25V or higher and a capacitance of 10uF-100uF) must be connected in parallel with the positive and negative terminals of the motor to prevent the reverse voltage spikes generated by the motor from interfering with the protection board or damaging the MOSFET.

Note 4: When connecting three sets of batteries in series, ensure that each set has the same voltage. If they are not the same, fully charge each set individually before connecting them in series. During the discharge test, the set whose voltage drops faster is the weakest battery.

For customers with limited electronics knowledge: Never mix good and bad batteries! The closer the capacity/internal resistance of the three sets of batteries are, the better! (The effect of using 2 good batteries + 1 bad battery = the effect of using 3 bad batteries).

Conditions for successfully starting the electric drill:

1. Requires 3 x 15C-20C power batteries, or 6 x 10C-15C power batteries. (A standard 18650 battery cannot start the drill!!!)

2. The connection between the battery pack and the protection board should be as short as possible, and the wire core should be as thick as possible.

3. When soldering the battery for the first time, do not connect any load or device to the output terminal.

4. If it still cannot be started, please contact the shop owner again for a solution.