4-String 14.8V 16.8V 18650 Lithium Battery Protection Board With Balanced Starting Electric Drill 40A CurrentItem NO.: 4S40A

4-String 14.8V 16.8V 18650 Lithium Battery Protection Board 40A

Product Description:

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

Product size: 46 * 60 * 3.4mm (balanced version)

Product weight: 10.3g (balanced version)

Charging voltage: 16.8V -18.1V

Continuous discharge current (upper limit): 40A (If the cooling environment is not good, please reduce the load current for use)

Continuous charging current (upper limit): 20A

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

Enhanced version: suitable for electric drills with starting current below 80A and power below 135W.

Balanced version: suitable for electric drills with starting current below 80A and power below 135W.

Note 1: Successfully starting the drill requires 4 15C-20C power batteries or 8 10C-15C power batteries (regular 18650 cannot start the drill!!!).

Attention 2: Strictly follow the wiring diagram for 0V, 4.2V, 8.4V, 12.6V, and 16.8V, and do not intentionally short circuit.

Attention 3: When carrying a load with a brush motor, it is recommended to parallel a non polar capacitor (with a voltage resistance of 25V or above and a capacity of 10uF-100uF) at the positive and negative terminals of the motor to prevent the reverse peak voltage generated by the motor from interfering with the protection board or breakdown of MOS transistors.

Note 4: When connecting four sets of batteries in series, please ensure that the voltage of each set of batteries is the same. If not, please fully charge each set of batteries separately before using them in series... During the discharge test, the group of batteries with a faster voltage drop is a poor battery.