The 4S 40A 16.8V Li-Ion Battery Protection Board (BMS) is designed to provide reliable protection and management for 4-cell lithium-ion battery packs built with 18650 cells. It enhances battery safety by monitoring charging and discharging conditions while protecting against overcharge, over-discharge, overcurrent, and short-circuit events. With support for up to 40A continuous discharge current and 20A charging current, this BMS is suitable for high-power battery packs used in electric mobility, energy storage systems, power tools, robotics, and DIY battery projects. Its compact design allows easy integration into custom battery pack assemblies.
