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Li-ion Battery Charger Protection Module 1S 2A

2S 3A Li-ion Lithium Battery 7.4V 8.4V 18650 Charger Protection Board Module is a small PCB mounted Li-ion Lithium Battery charger protection module


SKU: OKY3399-1 Categories: ,

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Li-ion Battery Charger Protection Module 1S 2A Charger BMS Protection Board Module is a small PCB mounted Lithium Battery charger protection module. This small and smart BMS module comes with various features like Short circuit, Overcharge, Over-discharge, Overcurrent protection. It is straightforward to install and convenient to use in all your DIY portable projects.

Li-ion Battery Charger  1S 2A   has Built-in three-stage over-current detection circuit (over-current 1, over-current 2, or load short circuit). MOS transistor can control the battery charge and discharge.

BMS may also feature a precharge system allowing a safe way to connect the battery to different loads and eliminating the excessive inrush currents to load capacitors.



  • Short circuit protection
  • Overcharge protection
  • Over-discharge protection
  • Overcurrent protection


  • Overcharge Detection Voltage: 4.25±0.05V
  • Over-Discharge Detection Voltage: :2.54±0.1V
  • Maximal continuous charging/discharge current: 2A
  • Maximal continuous Discharging current: 3A
  • Operating Temperature: -40-50℃
  • Internal Resistance: Less than 45m Ω
  • B+ B-: The interface of the battery core
  • P+ P-: The connector of the battery board
  • MB: The connection point between the batteries
  • B+: Battery V+ Positive
  • B-: Battery V- Negative
  • P+: Output / Charging V+
  • P-: Output / Charging V-
  • Size: Approx. 40x5x3mm
Package Included:

1 x 1S 3.7V 2A li-ion BMS PCM 18650 Battery Protection Board

Development  Resources: demo codes, schematics, datasheets, etc.

How to make 7.4 – 8.4V DC Battery Pack 2 18650 circuit protection Diagram


1. There may be slight size deviations due to manual measurement, different measuring methods and tools.
2. The picture may not reflect the actual colour of the item because of different photographing light, angle and display monitor.

Li-ion Battery Charger Protection Module 1S 2A

SKU: OKY3399-1 Categories: ,


20 in stock

Title Range Discount
Qty Discount 5 + 5%
Qty Discount 10 + 7.5%

Product Applications

We Customize Just for You!!

Tempero Systems offers many custom IoT electronic design services to help tailor our product to your exact needs. Whether you are looking for custom firmware, circuit board modifications, metal enclosures, or industrial color printing, we can help you with a wide variety of design services.