1S 3A 3.7V Li-ion BMS PCM Protection Board for 18650 Battery – Without Wires

1S 3A 3.7V Li-ion BMS PCM Protection Board for 18650 Batteries

Protect a compatible single-cell lithium-ion battery pack with this compact 1S Li-ion BMS/PCM Protection Board. Designed for 3.7V nominal lithium-ion batteries, this board provides protection against common battery operating faults when correctly installed.

Key Features

• Single-cell (1S) design: For one Li-ion cell or a compatible battery pack with cell groups connected in parallel.

• 3.7V nominal battery voltage: Suitable for compatible standard lithium-ion chemistry.

• Protection functions: Overcharge, over-discharge, overcurrent and short-circuit protection are advertised for this board type.

• Compact PCB: Suitable for integration into compatible battery-powered electronics.

• Without wires: Solder connections are required; wires and battery cells are not included.

• Battery charge and discharge control: Protection circuitry uses electronic switching to interrupt current under specified fault conditions.

Technical Specifications

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

• Configuration: 1S (single cell group)

• Nominal battery voltage: 3.7V

• Typical full-charge voltage for standard Li-ion chemistry: 4.2V

• Advertised current class: 3A

• Continuous charge/discharge current: Confirm with the supplier before use

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

• Connections commonly marked: B+, B−, P+ and P−; confirm the markings on your actual board

• Wiring: Not included

• Compatible battery format: 18650 or other suitable single-cell Li-ion packs, subject to physical and electrical compatibility

Potential Applications

• Single-cell 18650 battery packs

• Portable electronics

• Rechargeable LED lights

• Small DIY battery-powered projects

• Compatible low-power electronic devices

Important Compatibility and Safety Notes

This board is a protection circuit, not a battery charger. Use a suitable charging circuit designed for a standard 4.2V full-charge Li-ion cell. Do not use it with a different battery chemistry unless the board manufacturer explicitly confirms compatibility.

The advertised 3A value should not be assumed to be a guaranteed continuous current rating. Confirm continuous current, protection thresholds and wiring requirements with the supplier before connecting your load.

Package Includes

1 × 1S 3A Li-ion BMS/PCM Protection Board without wires.

Battery cell, wires, charger and other accessories are not included.