3S 20A BMS 18650 Li-ion Battery Protection & Charging Module – 11.1V/12.6V Battery Management System

Ensure safe and efficient operation of your lithium battery packs with the 3S 20A BMS (Battery Management System) Module, designed specifically for 18650 Li-ion batteries. This module supports a 3S configuration (3 cells in series), delivering a nominal voltage of 11.1V and a fully charged voltage of 12.6V.

Engineered for reliability, the BMS provides essential protection features including overcharge, over-discharge, overcurrent, and short-circuit protection, ensuring extended battery life and safe usage. With a 20A continuous discharge current, it is suitable for high-power applications such as robotics, power tools, and DIY battery packs.

Compact and easy to integrate, this module is an essential component for building safe and efficient rechargeable battery systems for IoT, embedded, and portable electronics projects.

🚀 Key Features

• Designed for 3S (3-cell) 18650 Li-ion battery packs
• Supports up to 20A continuous discharge current
• Built-in protection:
  • Overcharge protection
  • Over-discharge protection
  • Overcurrent protection
  • Short-circuit protection
• Ensures battery balancing and extended lifecycle
• Compact and lightweight design
• Easy integration into DIY battery packs

📦 Package Includes

• 1 × 3S 20A BMS 18650 Li-ion Battery Protection Module

📊 Technical Specifications

• Battery Type: Li-ion (18650)
• Configuration: 3S (11.1V nominal / 12.6V max)
• Continuous Discharge Current: 20A
• Charging Voltage: 12.6V DC
• Protection Functions: Overcharge, over-discharge, overcurrent, short circuit

💡 Recommended Applications

• DIY lithium battery packs
• Robotics and automation systems
• Electric vehicles and RC projects
• Solar energy storage systems
• Power tools and backup systems
• IoT and portable electronics
• Battery-powered embedded systems