3S 10A BMS 12V Li-ion Battery Protection Board for 18650
3S 10A BMS 12V Li-ion Battery Protection Board for 18650
3S 10A BMS 12.6V Lithium Battery Protection Board Module for 18650 Li-ion Cells
Keep your 3-cell lithium-ion battery packs running safely and efficiently with this compact 3S 10A Battery Management System (BMS) Protection Board. Designed for 18650 Li-ion packs operating at 11.1V nominal / 12.6V fully charged, this SMD module guards against overcharge, over-discharge, and overcurrent — extending the life of your battery pack and the devices it powers.
Made in Mainland China.
Key Features
- 3S Configuration: Supports three 18650 Li-ion cells in series (11.1V–12.6V range)
- 10A Continuous Discharge Current: Handles demanding loads with consistent performance
- Overcharge Protection: Automatically cuts off charging when cells reach 4.2V per cell
- Over-Discharge Protection: Disconnects load when voltage drops below safe threshold
- Overcurrent & Short-Circuit Protection: Safeguards cells and connected devices
- Supply Voltage: 12.6V max
- Operating Temperature: -40°C to 80°C — suitable for a wide range of environments
- SMD Package: Compact surface-mount design for easy integration into DIY builds
- No High-Concern Chemicals: Clean, safe construction
- Condition: Brand new
- Available in packs of 1 to 5 units — stock up and save
What Is a BMS?
A Battery Management System (BMS) is an essential electronic module for any lithium-ion battery pack. It monitors cell voltage, temperature, and current in real time, actively protecting your cells from conditions that can cause premature failure or safety hazards. This 3S module is ideal for DIY power tools, portable power stations, e-bike auxiliary packs, RC projects, and more.
Technical Specifications
| Cell Configuration | 3S (3 cells in series) |
| Nominal Voltage | 11.1V |
| Max Charge Voltage | 12.6V |
| Continuous Current | 10A |
| Package Type | SMD |
| Operating Temperature | -40°C to 80°C |
| Compatible Cells | 18650 Li-ion |
| Origin | Mainland China |
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Frequently Asked Questions
Q: What battery cells is this 3S BMS protection board compatible with?
A: This BMS module is designed for 3-cell series configurations of standard 18650 lithium-ion (Li-ion) cells. It operates across a voltage range of 11.1V (nominal) to 12.6V (fully charged), making it ideal for most 3S 18650 Li-ion battery packs used in DIY electronics, power tools, and portable devices.
Q: How many units do I receive in a single order?
A: This listing is available in quantities of 1 to 5 BMS protection board modules per order. Simply select your preferred quantity when adding to your cart — great for builders and hobbyists who need multiple boards for ongoing projects.
Q: What protections does this BMS module provide?
A: This 3S 10A BMS protection board provides overcharge protection (cuts off at 4.2V per cell), over-discharge protection, overcurrent protection, and short-circuit protection. These features work together to maintain safe operating conditions and extend the overall lifespan of your 18650 Li-ion battery pack.
Q: Is this BMS module suitable for DIY projects and custom battery builds?
A: Yes! The compact SMD form factor and wide operating temperature range (-40°C to 80°C) make this module an excellent choice for custom battery packs, DIY electronics, RC vehicles, portable power banks, and other 12V Li-ion applications requiring reliable battery management.