Product Description

Protect your compatible 4-series lithium-ion battery pack with the HX-4S-F100A 100A Battery Management System (BMS).

This battery protection board is designed for compatible 4S lithium-ion battery assemblies using 18650 cells. A standard 4S lithium-ion pack has a nominal voltage of 14.8V and a full-charge voltage of 16.8V when using 3.7V nominal cells.

The board is advertised with a 100A current rating, multiple MOSFETs and a metal heat-dissipation plate. Retailer listings describe protection against overcharge, over-discharge, overcurrent, short circuit and temperature-related conditions.

The board is intended for compatible battery pack assembly, repair and high-current electronics projects. Actual current capability depends on the battery cells, wiring, connectors, cooling and installation.

Important: Confirm the exact HX board version, battery chemistry, charging-current limit, balancing function and wiring arrangement before installation.

Key Features

• 4S Battery Configuration: Designed for compatible four-series battery packs.

• 18650 Li-ion Compatibility: Suitable for compatible standard lithium-ion 18650 cell groups.

• 14.8V Nominal Pack: Based on four standard 3.7V nominal lithium-ion cell groups.

• 16.8V Full-Charge Voltage: Based on standard 4.2V-per-cell lithium-ion charging.

• 100A Advertised Current Rating: Verify the actual continuous discharge capability of your board.

• 10 MOSFETs Advertised: Retailer descriptions identify multiple MOSFETs for switching and protection.

• Metal Heat-Dissipation Plate: Helps manage heat generated during operation.

• Battery Protection: Retailers advertise overcharge, over-discharge, overcurrent, short-circuit and temperature protection.

• Balance Function Advertised: Confirm the balancing function and balancing current for the actual PCB.

• Battery Pack Assembly: Suitable for compatible battery repair, assembly and DIY projects.

Technical Specifications

Specifications are compiled from retailer listings for the HX model family. Exact current ratings, protection thresholds, balancing performance, dimensions and included wiring may vary by version.

Typical Applications

• Compatible 4S 18650 lithium-ion battery packs

• Battery pack assembly and repair

• High-current DIY electronics projects

• Compatible portable power systems

• Robotics and battery-powered equipment

• Compatible power tool battery projects

• Electronics prototyping and battery protection projects

Installation & Safety

1. Confirm that the board is designed for your exact battery chemistry and 4S configuration.

2. Use four compatible cell groups with matching chemistry, capacity and condition.

3. For standard 3.7V nominal lithium-ion cells, use a compatible 16.8V CC/CV charger.

4. Verify the actual PCB terminal labels and wiring harness before connecting cell taps.

5. Confirm the continuous discharge current and charging current separately.

6. Use suitable high-current wiring, connectors, insulation and heat management.

7. Confirm whether cell balancing is included and check its specifications.

8. Do not connect a different cell count or chemistry unless the exact board supports it.

9. Do not intentionally short-circuit the battery or protection board.

10. Installation should be performed by someone familiar with lithium battery systems.

Important: This is a battery protection board, not a standalone charger. A 100A advertised rating does not guarantee that the complete battery pack can safely deliver 100A continuously.

Package Includes

• 1 × HX-4S-F100A / compatible 4S BMS protection board

Balance cable or wiring harness may be included depending on the supplied version. Battery cells, charger, enclosure and additional accessories are not included unless specifically stated.

Product images may show a similar board for reference. Confirm the actual PCB model and terminal markings before installation.