Product Description:

This high-quality BMS (Battery Management System) protection board is designed for 3S and 4S Li-ion battery packs, providing essential safety features for your projects, especially for high-current applications like drill motors.

• Dual Version: Includes both a 3S 40A Enhanced Version and a 4S 40A Balanced Version to suit different battery configurations.
• High Current Capacity: Supports a continuous discharge current of up to 40A. 
• Protection Features: Provides comprehensive protection against overcharge, over-discharge, over-current, and short circuits. 
• Balancing Function: The 4S version includes a balancing function to ensure all cells in the battery pack are charged and discharged evenly, extending battery life. 
• Wide Application: Ideal for 18650, polymer, and other 3.7V nominal voltage lithium batteries. Perfect for use in cordless drills, electronic bikes, and other power tools. 
• Voltage Specifications: The 3S board is for 11.1V (nominal) to 12.6V (full charge) battery packs, while the 4S board is for 14.8V (nominal) to 16.8V (full charge) battery packs.