1S 10A BMS Module – Complete protection for 18650 Li-ion and LiPo DIY projects
Whether you are building a custom power bank, refurbishing a battery pack, or integrating an 18650 cell into a bespoke device, safety is paramount. Without a BMS module between your cell and the circuit, a short circuit or deep discharge can ruin your battery in seconds. This 6-pack of 1S BMS modules provides a compact, reliable, and easy-to-integrate solution for all your battery management needs.
Note: Please follow the wiring diagram carefully. Reversing polarity or incorrect wiring can cause permanent damage to both the module and your protected battery.
Why choose this set? (Key Advantages):
- 4-in-1 Protection: Includes overcharge (4.23V), over-discharge (2.45V), overcurrent (15A), and instant short-circuit protection.
- Reliable DW01 + 8205A Circuitry: Built with high-quality components for stable, precise protection thresholds that won’t drift over time.
- 10A Continuous, 12A Peak: Perfectly suited for high-drain applications like small motors, high-intensity LED lighting, and wireless modules with current spikes.
- Ultra-Compact (35 × 7.6 × 2 mm): Designed to fit into tight enclosures where space is at a premium.
- 6-Pack Value: Ideal for multiple projects or keeping spares on hand without extra shipping costs.
- Universal Compatibility: Works with any 3.7V cell, including 18650, 14500, 16340, and 1S LiPo batteries.
Performance and Technical Details
The DW01 IC continuously monitors cell voltage, triggering the 8205A MOSFETs to disconnect the circuit the moment voltage exceeds 4.23V (charging) or drops below 2.45V (discharging). The short-circuit protection is instantaneous, cutting power immediately to safeguard your cell and connected electronics. When operating near the 10A continuous limit, ensure adequate ventilation within your enclosure to maintain optimal operating temperatures.
| Parameter | Value / Detail |
|---|---|
| Cell Configuration | 1S (Single Cell) |
| Nominal Battery Voltage | 3.7V (Li-ion / LiPo) |
| Continuous Discharge Current | 10A |
| Peak Current (Transient) | 12A |
| Overcurrent Detection Threshold | 15A |
| Overcharge Protection | 4.23V ±0.05V |
| Over-discharge Protection | 2.45V ±0.1V |
| Short-Circuit Protection | Yes (Instant cut-off) |
| Integrated Circuit | DW01 + 8205A |
| Module Dimensions | 35 × 7.6 × 2 mm |
| Connectors | B+ (bat+), B- (bat-), P+ (out+), P- (out-) |
| Compatibility | 18650, 14500, 16340, 1S LiPo |
| Quantity | 6 Modules |
Wiring and Usage Instructions
- Connect B+ to the positive terminal of your Li-ion or LiPo cell.
- Connect B- to the negative terminal of the cell.
- Connect P+ to the positive wire of your load or charger.
- Connect P- to the negative wire of your load or charger.
- Double-check all polarity before powering on; incorrect connections will permanently damage the module.
- Do not exceed 10A continuous current to prevent overheating.
Package Contents
- 6 × 1S 18650 3.7V 10A BMS Protection Module (DW01 + 8205A)
Frequently Asked Questions
Does this work with high-capacity 18650 cells (3000–3500 mAh)?
Yes. This module protects any 3.7V nominal 1S cell regardless of its capacity, including 18650, 14500, 16340, and LiPo formats.
Can I charge and discharge simultaneously through this module?
The module uses a common port (P+/P-) for both charging and discharging. Simultaneous connection of a charger and a load is not recommended without an external isolation circuit, as it may lead to unpredictable protection behavior.
How do I reset the module after a short-circuit trip?
Simply remove the cause of the short circuit, then either connect the charger or disconnect and reconnect the battery. The module will automatically reset to normal operation.
Do I need a heatsink for 8–9A continuous use?
At currents below 10A with minimal ventilation, a heatsink is generally not required. If you are operating near the maximum limit in a warm environment or a fully sealed enclosure, ensure some airflow to keep temperatures within safe limits.
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