Features: Design for LiFePO4 battery systems, this 4S 12V100ABMS features multiple protections (overcharge, discharge, short circuits, balance, and temperature protections) with high efficiency aluminum heat dissipation and 100A continuous discharge capacity. Equipped with low resistance tubes (≤5mΩ main circuit resistance) and precise voltages detection (3.65V overcharge/2.35V discharge thresholds), it ensures stable balancing current while maintaining low stand by power consumption ≤40μA. Ideal for DIY enthusiasts, solar energy system builders, and electric vehicle modifiers requiring reliable battery management with industrial short circuits response (≤350μs triggering) and weak current switching functionality. Optimized for highly demand scenario like home energy storage, power tool, and batteries where temperature monitoring prevents thermals runaway during rapid charging cycles or extreme environmental conditions. The ruggeds aluminum housing enables 50A same port charging compatibility, while its multistage protections logics (1000ms delay for overloads, instantly short circuits cutoff) safeguards 4cell LiFePO4 packs in marine applications, robotics, and backup power systems. Specifications: Component:Plastic Cell type:LiFeP04 Size:Approx.145x65mm/5.71x2.56inch Overcharge voltages:3.65V Overdischarge voltages: 2.35V Common Port with Balance Discharge Current:<100a Charge Current:<50a Package Includes: 1pc Battery Protections Board 1pc Wire 4pcs Screw note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.