The BMS LFP 4S 20A JBD (CP04S005) (836f) is a compact and efficient Battery Management System designed for 4S (12.8V) LiFePO4 batteries. It provides reliable 20A continuous current protection, ensuring safe charging and discharging operations. Equipped with advanced protection features, it safeguards batteries from overcharge, over-discharge, overcurrent, short circuit, and temperature fluctuations. Its small and lightweight design makes it suitable for portable battery packs, DIY power banks, and low-power applications.