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Product Description
The BMS 3S 12.6V 10A Li-ion Battery Protection Module is a high-performance safety circuit engineered for 3-series lithium-ion and lithium-polymer battery packs (11.1V nominal / 12.6V full charge). Designed to protect standard 3-cell 18650 or LiPo configurations, this compact module provides comprehensive safety against overcharging, over-discharging, over-current, and output short circuits, ensuring maximum battery performance and longevity.
Featuring low-resistance MOSFETs and precision voltage sensing circuitry, it delivers a steady 10A continuous discharge current—making it the ideal protection module for 12V DC power supplies, cordless drill battery conversions, portable audio amplifiers, and custom robotics projects.
⚠️ Wiring & Safety Tip: Always connect your battery tap wires strictly in order starting from 0V (B-), then 3.7V (B1), 7.4V (B2), and finally 11.1V (B+). Verify that all three battery cells are closely matched in voltage before assembling them into a series pack.
Technical & Architectural Highlights
Comprehensive 3S Multi-Protection: Shields 3-series battery packs from overcharging, deep discharge, continuous over-current, and short circuits.
10A Continuous Output: Delivers stable, continuous 10A output with minimal heat generation under standard working loads.
Compact PCB Form Factor: Small footprint allows clean mounting inside battery casings, 3D-printed enclosures, and project boxes.
12V Native System Compatibility: Perfectly matches 12V DC appliances, LED strips, motor drivers, and power tools.
🧰 Recommended Batteries & Power Accessories
Completing your 3S battery pack or power project? Add these matching batteries and power management essentials to your order:
Lithium Battery Protection Boards (BMS): Explore various voltage configurations and current ratings for custom pack assembly: Pro Tronix BMS Modules Collection
18650 & Cylindrical Lithium-Ion Batteries: High-capacity rechargeable cells ideal for building custom 3S battery packs and power supplies: Pro Tronix Lithium Batteries Collection
Lithium Polymer (LiPo) Batteries: Compact single and multi-cell LiPo packs for lightweight portable electronics: Pro Tronix LiPo Batteries Collection
1S – 2S Lithium Battery Charger Modules: Dedicated charging boards and step-up/down power modules for lithium chemistry: Pro Tronix Lithium Charger Collection
Battery Holders & Connectors: Secure 18650 battery holders, nickel strips, and wire leads for clean pack assembly: Pro Tronix Battery Holders Collection
Technical Specifications
| Parameter | Value / Specification |
| Battery Chemistry | Lithium-ion / LiPo (3.6V / 3.7V nominal per cell) |
| Series Configuration | 3S (3 Cells in Series) |
| Nominal Pack Voltage | 11.1 V |
| Full Charging Voltage | 12.6 V |
| Continuous Discharge Current | Max 10 A |
| Overcharge Protection Voltage | 4.25V ± 0.05V per cell |
| Over-discharge Protection Voltage | 2.50V ± 0.08V per cell |
Applications
DIY 12V Lithium Battery Packs: Building rechargeable 12V packs for LED lights, wireless routers, and field equipment.
Power Tool Battery Upgrades: Converting older NiCd/NiMH power tool packs to 3S 18650 lithium power.
Robotics & RC Projects: Reliable power protection for 12V DC gear motors, microcontrollers, and motor drivers.
What’s in the Box
1 x BMS 3S 12.6V 10A Li-ion / LiPo Battery Protection Board.
All your electronics components and prototyping accessories are available with fast shipping across Egypt from Pro Tronix!
