Description
The 1S 3A 3.7V 18650 Li-ion Lithium Battery BMS Protection Board is designed to protect a single 3.7V Li-ion or 18650 rechargeable battery from common electrical problems. This compact BMS board provides essential overcharge, over-discharge, over-current, and short-circuit protection, helping improve the safety and reliability of your battery-powered project.
It is a practical choice for DIY 18650 battery packs, portable electronics, LED lights, small power banks, rechargeable devices, and other single-cell lithium battery projects. The board is small, easy to integrate, and provides a simple protection solution where a dedicated battery management circuit is required.
The module uses a dedicated protection IC and MOSFET-based protection circuit for stable performance. It supports a maximum continuous charging current of 2A and a maximum continuous discharge current of 2A, with over-current protection around 3A.
Connection Guide
- B+ → Connect to the positive terminal of the 18650 Li-ion battery.
- B- → Connect to the negative terminal of the battery.
- P+ → Positive input/output connection.
- P- → Negative input/output connection.
Key Features
- Suitable for 1S 3.7V Li-ion and 18650 batteries
- Overcharge protection
- Over-discharge protection
- Over-current protection
- Short-circuit protection
- Maximum continuous charging current: 2A
- Maximum continuous discharge current: 2A
- Over-current protection: 3A
- Compact PCB design
- Suitable for DIY battery packs and electronics projects
- Simple B+, B-, P+, and P- connection points
Specifications
| Specification | Details |
|---|---|
| Product Type | 1S Li-ion Battery BMS Protection Board |
| Battery Type | Li-ion / 18650 |
| Battery Configuration | 1S |
| Nominal Battery Voltage | 3.7V |
| Overcharge Voltage | 4.25 ± 0.05V |
| Overcharge Release Voltage | 4.23 ± 0.05V |
| Over-discharge Voltage | 2.54 ± 0.1V |
| Maximum Continuous Charging Current | 2A |
| Maximum Continuous Discharge Current | 2A |
| Over-current Protection | 3A |
| Protection Functions | Overcharge, Over-discharge, Over-current, Short Circuit |
| Connection Terminals | B+, B-, P+, P- |
| Application | 18650 battery packs, DIY electronics, portable devices, LED projects |
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