Browse our selection of 4S Li-ion BMS modules, engineered for 4-cell (14.8V) lithium-ion battery packs. These modules provide essential safety features including overcharge, over-discharge, overcurrent, and short circuit protection, making them ideal for use in e-bikes, solar battery storage, DIY electronics, and portable power systems.

Available in a variety of output current ratings, they also include cell balancing to maintain consistent voltage across all cells and extend battery lifespan. Whether you're building a custom battery pack or upgrading an existing one, our 4S BMS modules offer reliable performance and easy integration. Choose the right module to match your project’s requirements and ensure your battery system runs safely and efficiently.