TET Board for 4S, 14.8V / 16.8V 20A Li-ion Batteries



More information and photos below.

Availability: 99776 in stock

TET Board for 4S, 14.8V / 16.8V 20A Li-ion Batteries

414.8V 3


4 series 18650 battery 16.8V 16V 14.8V
14.8V (Li-ion 18650 or li-ion battery rated voltage)
16.8V (Li-ion battery full charge voltage)
14.4V ( Lipo battery pack rated voltage)
1) This board is not suitable for high powered electronic tools, if used for screwdriver and drill, please don’t buy.
2)Above 3A device,means the battery discharge rate is more than 3C.
1C rated battery, 2000mah equals 2ah*1=2A max working current.
3C rated battery means 2ahx3=6A Max working current.


1) high-accuracy voltage detection circuit;

2) terminal of the charger using high voltage device;

3) Built-in three-stage over-current detection circuit (over-current 1, over-current 2, or load short circuit);

4) MOS transistor can control the battery charge and discharge;

5) low standby current consumption.

4S LI-ION BMS ParameterS:

Over Charge Voltage:4.25-4.35v±0.05v
Over Discharge Voltage: 2.3-3.0v±0.05v
Max working current:10A         
Max Peak current:20A  
Working Temperature:-40—+50  
Storage Temperature:-40– +80
Small current:6uA          
Life cycle:50000hours
Short cut Protection:Protectable ,change for repair                                                                                                     

BMS solder instruction:

B+  connected battery positive;

B1  the connect point between battery 1 and battery 2

B2  connect the point between battery2 and battery 3 

B3  Connect the point between battery 3 and battery 4

B- connect to battery negative end 

P- + connection charge / discharge positive;

P-  connection charge / discharge negative

Note :B-,B+,P+,P- should be connected with thick wires


  • Type: Voltage Regulator
  • Model Number: 4S 14.8V battery protection board
  • Application: Computer
  • Operating Temperature: -40-+85
  • Supply Voltage: 4S 14.8V
  • Package: SMD


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