4S 16.8V 25A BMS Board for 18650 Lithium Battery Packs
4S 16.8V 25A BMS Board for 18650 Lithium Battery Packs
4S 16.8V 25A BMS Protection Board for 18650 Ternary Lithium Battery Packs
Keep your 18650 lithium battery packs running safely and efficiently with this compact 4S Battery Management System (BMS) board. Designed for 16.8V ternary lithium configurations at up to 25A, it delivers comprehensive electronic protection in a tiny 35×35mm footprint — ideal for power tools, solar LED lighting systems, and other battery-powered equipment.
Key Features
- All-Round Circuit Protection: Built-in overcharge, over-discharge, over-current, and short-circuit protection safeguard your battery cells and connected devices, ensuring stable and secure operation at all times.
- Wide Compatibility: Engineered specifically for 4S 16.8V 25A ternary lithium battery configurations, it integrates seamlessly with 18650 battery packs used in power tools, solar LED lights, and similar applications.
- High-Efficiency Circuit Design: Premium-grade electronic components deliver consistent voltage and current output, maximising battery utilisation efficiency and extending the service life of your devices.
- Easy Installation: Clearly labelled wiring ports and intuitive board markings make setup straightforward — no specialised expertise required. Most users can complete installation within minutes.
- Durable & Eco-Conscious: A longer-lasting BMS means fewer battery replacements over time, reducing waste and supporting a more sustainable approach to power management.
Specifications
| Configuration | 4S (4 cells in series) |
| Charge Voltage | 16.8V |
| Continuous Current | 25A |
| Battery Chemistry | Ternary Lithium (e.g. 18650) |
| Material | PCB Board |
| Color | Green + Black |
| Dimensions | 35 × 35 mm |
| Country of Origin | Made in Mainland China |
Package Contents
- 1 × 4S 16.8V 25A BMS Protection Board
Notes
- Please allow a 2–3% size deviation due to manual measurement.
- Actual product color may differ slightly from images due to monitor display settings.
- Battery cells, charger, and other accessories are not included.
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Learn more: ENERGY STAR product efficiency guidance
Frequently Asked Questions
Q: What battery type is this 4S BMS board compatible with?
A: This BMS board is designed specifically for 4S ternary lithium battery packs (such as 18650 cells) configured at 16.8V with a continuous current rating of 25A. It is commonly used in power tools, solar LED lighting systems, and similar portable power applications.
Q: What protection functions does this BMS board provide?
A: The board provides four key protection functions: overcharge protection, over-discharge protection, over-current protection, and short-circuit protection. Together, these safeguard both the battery cells and connected devices from damage during charging and discharging cycles.
Q: Is this BMS board difficult to install?
A: No — the board features clearly labelled wiring ports and intuitive markings, making it straightforward to install even without professional electronics experience. Most users can complete the setup in just a few minutes.
Q: Does this board come with batteries or a charger?
A: No. This listing includes only the BMS protection board (1 piece). Batteries, charger, and other accessories must be purchased separately.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.