1s 3.7v 3a Li-Ion BMS PCM Protection Board.

The 1S 3.7V 3A Li-ion BMS PCM Battery Protection Board is a compact and reliable battery management module designed for single-cell (1S) 18650 lithium-ion battery packs. It provides essential protection functions to ensure safe charging and discharging operations while extending battery lifespan and improving overall performance. This PCM (Protection Circuit Module) supports up to 3A continuous current and includes built-in overcharge protection, over-discharge protection, overcurrent protection, and short-circuit protection. It helps prevent battery damage caused by unsafe operating conditions, making it ideal for portable electronics, DIY battery packs, power banks, LED lighting systems, Bluetooth speakers, and embedded electronic projects.