4S 40A BMS 12.6V Lithium Battery Charger Protection Board - Balanced

This 4S 40A Balanced BMS is designed to manage 4-cell lithium battery packs using 3.7V nominal cells, including 18650, 26650, and lithium polymer types. It features built-in active balancing to ensure each cell is charged to the same voltage level, helping maximize pack performance, reliability, and lifespan.

Suitable for applications such as electric tools, e-scooters, energy storage, and DIY battery systems, the board provides all the essential protections while maintaining balanced cell voltages.

Key Features:

• Supports 4S (4-cell series) lithium battery packs
• Nominal Pack Voltage: 14.8V / Max Charging Voltage: 16.8V
• Continuous Discharge Current: Up to 40A
• Balanced Charging: Actively equalizes cell voltages during charge
• Protection Functions:
  • Overcharge protection
  • Over-discharge protection
  • Overcurrent protection
  • Short-circuit protection
• Automatic Fault Recovery
• Ideal for: Battery packs that are frequently charged/discharged and require cell health maintenance

This product can be found here:

• Batteries, Chargers & Holders
• Battery Chargers & BMS
• Power