1S 3A 3.7V Li-ion BMS PCM Protection Board With Wire for 18650 Battery

1S 3A 3.7V Li-ion BMS PCM Protection Board With Wire for 18650 Battery

Protect a compatible single-cell lithium-ion battery pack with this 1S 3A Li-ion BMS/PCM protection board with wire. Designed for 3.7V nominal lithium-ion battery applications, this compact protection circuit helps manage battery charging and discharging while providing protection against specified electrical fault conditions.

The board is suitable for compatible 18650 battery packs and other single-cell lithium-ion projects where the battery voltage, current requirements, and protection characteristics match the board's specifications.

Key Features

• Single-Cell Battery Protection: Designed for compatible 1S lithium-ion battery packs with a nominal voltage of 3.7V.

• Protection Functions: The listed board version is advertised with overcharge, over-discharge, overcurrent, and short-circuit protection.

• Wired Connections: Supplied with wires to simplify integration into compatible battery-pack assemblies.

• Compact PCB Design: Suitable for battery-powered electronics and space-conscious DIY projects.

• Charging and Discharging Control: The protection circuit monitors specified battery conditions and controls the battery connection when protection thresholds are triggered.

• 18650 Battery Compatibility: Intended for compatible single-cell 18650 lithium-ion battery applications.

Technical Specifications

• Product type: Li-ion BMS/PCM battery protection board

• Battery configuration: 1S, single cell

• Nominal battery voltage: 3.7V

• Advertised current class: 3A

• Battery type: Compatible single-cell lithium-ion battery

• Common battery format: 18650

• Protection functions advertised: Overcharge, over-discharge, overcurrent, and short circuit

• Connections: Wired version

• Battery terminals: Commonly marked B+ and B−

• Protected input/output terminals: Commonly marked P+ and P−

• Overcharge detection voltage: Seller-listed value of 4.25 ± 0.05V; confirm against the exact board revision

• Overcharge release voltage: Seller-listed value of 4.23 ± 0.05V; confirm against the exact board revision

• Over-discharge detection voltage: Seller-listed value of 2.54 ± 0.1V; confirm against the exact board revision

• Overcurrent detection: Seller-listed range of 1–3A; this is not a guarantee of 3A continuous operation

Typical Applications

• Single-cell 18650 lithium-ion battery packs

• Rechargeable LED lighting projects

• Portable electronics and low-power battery-powered devices

• DIY electronics and embedded projects

• Compatible backup-power applications

• Battery-powered devices requiring single-cell protection

Connection Guidance

• B+: Commonly connects to the battery positive terminal.

• B−: Commonly connects to the battery negative terminal.

• P+: Commonly the protected positive connection for the load or charger.

• P−: Commonly the protected negative connection for the load or charger.

Always follow the labels and wiring diagram for the exact board supplied. Terminal arrangements can vary between versions.

Important Safety Information

This is a battery protection board, not a standalone battery charger. Use a suitable charger designed for the exact battery chemistry and cell configuration. Confirm the board's continuous charge and discharge current limits before use, and do not rely on the advertised 3A product class as a verified continuous-current rating.

Incorrect wiring, unsuitable charging equipment, excessive current, or a damaged battery can cause overheating or fire. Use compatible cells, observe polarity, insulate exposed conductors, and prevent short circuits.

Package contents: 1 × 1S 3A Li-ion BMS/PCM protection board with wire. Battery and charger are not included unless specified separately.

Specifications are based on comparable supplier listings. Electrical thresholds, current limits, dimensions, and wire details should be confirmed against the exact supplied board before publication.