3S 40A Li-ion Lithium Battery Charger Lipo Cell Module PCB BMS Protection Board For Drill Motor 12.6V with Balance


SKU: 32838973469 Category:


  • 3S 12.6V 40A lithium battery protection board (comes with recovery function-AUTO Recovery)

  • Scope: Nominal voltage of 3.7V lithium battery (including 18650,26650, polymer lithium battery)

  • Product Size: 41 * 55 * 3.4mm (Enhanced Version), 41 * 60 * 3.4mm (Balanced version)

  • Product weight: 8.8g (enhanced version), 9.8g (balanced version)

  • Charging voltage: 12.6V – 13.6V

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

  • Continuous charge current (upper limit): 20A

Enhanced version:Suitable for electric drill with starting current below 80A and power below 130W .(without balanced function)

Balanced version: Suitable for electric drill with starting current below 80A and power below 170W .(with balanced charging function)

Note 1: To successful starting the drill requires three 15C-20C power batteries, or six 10C-15C power batteries (ordinary 18650 battery can not start the drill!!).

Note 2: When you wiring 0V, 4.2V, 8.4V, 12.6V, please do it strictly according to the wiring diagram.Do not deliberately make it short circuit.

Note 3: When the battery is charging,the “430” resistance heating is normal,it means the balance circuit is working.If the “430” resistance is also heating without charging,please check if the wrong wire is connected.

Note 4: Do not use a mix of good battery and poor battery,please make sure each battery is the same in capacity and internal resistance.

For some of the poor basis of electronic customers to explain: balanced charge is only auxiliary functions, try not to put a good battery and poor battery mixed together! 3 sets of battery capacity / resistance closer to the better! (2 good battery +1 Poor battery use effect = 3 poor battery use effect).

Brand Name


Model Number

3S 40A Li-ion Lithium Battery Charger PCB BMS Protection Board

Continuous charge current (upper limit)


Continuous discharge current


Charging voltage

12.6V – 13.6V