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

The 4S 40A Enhanced BMS is a robust battery protection solution for 4-series lithium battery packs built from 3.7V nominal cells such as 18650, 26650, and lithium polymer batteries. Designed for high current applications, it offers strong protection features without cell balancing.

This version includes upgraded components that support short-duration peak loads (up to 80A) and is well-suited for systems that require reliable high-current delivery.

Key Features:

• Supports 4S lithium battery packs (14.8V nominal, 16.8V max)
• Continuous Discharge Current: Up to 40A
• Peak Start Current: Up to 80A (short-term)
• Power Handling: Up to ~180W output
• Protection Functions:
  • Overcharge
  • Over-discharge
  • Overcurrent
  • Short-circuit
• Auto Recovery After Faults
• No balancing function – intended for matched cells or external balance management
• Compact design for easy integration into various systems

This product can be found here:

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