Battery Charging Module 3S BMS 40A Protection Board 12.6V

The 3S BMS 40A Protection Board is designed for 3‑cell (3S) Li‑ion/Li‑Po battery packs with a nominal voltage of 11.1V and a charging voltage of 12.6V. It provides overcharge, over‑discharge, overcurrent, and short‑circuit protection, ensuring safe and reliable operation of high‑capacity battery packs.
With a 40A discharge current capacity, this module is suitable for power tools, drill motors, e‑bikes, robotics, and DIY energy storage projects requiring robust performance and extended battery life.

Specifications

• Battery Type: 3S Li‑ion / Li‑Po (18650 cells compatible)
• Nominal Voltage: 11.1V
• Charge Voltage: 12.6V
• Continuous Discharge Current: 40A
• Overcharge Protection: ~4.25V per cell
• Over‑discharge Protection: ~2.7V per cell
• Short‑circuit Protection: Yes
• Balance Function: Optional (varies by version)
• PCB Size: Compact design for integration into packs
• Applications: Drill motors, e‑bikes, robotics, DIY battery packs, portable electronics

Features

• 3S battery management system for 18650 Li‑ion/Li‑Po cells
• 40A discharge capacity for high‑power tools and devices
• Comprehensive protection (overcharge, over‑discharge, overcurrent, short circuit)
• Ensures battery safety and longevity
• Compact PCB design for easy installation
• Compatible with drill motors, robotics, and DIY projects

*Image shown is a representation only