7.4V BMS 2S 3A 18650 Lithium Battery Protection Board

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Sold By: HatchnHackSKU: F02-30

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A compact PCB mounted Li-ion Lithium Battery charger protection module called the 2S 3A Li-ion Lithium Battery 7.4V 8.4V 18650 Charger Protection Board Module. This compact and intelligent battery charger protection module has several features, including short circuit, overcharge, over-discharge, and overcurrent protection. It is really simple to set up and practical to use in all portable DIY tasks.

Pin Descriptions: 

B+ B-

The interface of battery core

P+ P-

The connector of the battery board


The connection point between the batteries


Battery V+ Positive


Battery V- Negative


 Output / Charging V+


Output / Charging V


*The protection board cannot be used for lithium iron phosphate batteries, hernia lamps, hand drill battery pack, electric fish battery pack, electric bicycle battery pack, buggy battery, 775 (4A) above the motor, 1W fisheye LED lamp.


  1. Over-Discharge Detection Voltage: 2.3-3.0V±0.05V.
  2. Maximum Working Current: 3A.
  3. Transient Current: 5A.
  4. Operating Temperature : -40-50 C.
  5. Internal Resistance: Less than 45m Ω.
  6. B+ B-: The interface of battery core.
  7. P+ P-: The connector of the battery board.
  8. MB: The connection point between the batteries.
 Model 7.4V BMS 2S 3A
Type Lithium Battery Protection Board 
Operating Temperature Range -40-50 C
Transient Current  5A
Maximum Working Current 3A
Over-Discharge Detection Voltage 2.3-3.0V±0.05V

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