Battery Charging Module 3S BMS 20A Protection Board 12.6V

The 3S BMS 20A 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 battery packs used in drill motors, DIY projects, e‑bikes, and portable devices.
With a 20A discharge current capacity, this BMS is ideal for medium‑power applications requiring stable 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: 20A
• 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 easy integration
• Applications: Drill motors, DIY battery packs, robotics, e‑bikes, portable electronics

Features

• 3S battery management system for 18650 Li‑ion/Li‑Po cells
• 20A discharge capacity for medium‑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