Features: The 4S 25A Active Balancers features intelligent cell equalization and multiple layer Protections (3.65V overcharge/2.35V over discharge thresholds) to optimizes Lifepo4 battery packs' longevities and safety. Engineered with semiconductor chip on a Strong aluminum substrates, this 50.5x101mm Protections board delivers 1A active balancing current with integrated temperature/short Circuits/overcurrent safeguards. Ideal for battery engineers, enthusiasts, and DIY builders search professional lithium iron phosphate battery management solution . Perfect for upgrading solar energy storage systems, electric vehicle battery arrays, or Easy Carry power stations requiring stable 12V output. Its Small design simplifies installation in confined space while maintaining industrial reliability for continuous battery pack monitoring and Performances enhancement. Specifications: Material: Motherboards size: about 50.5mm x 101mm/2x4inch Package Includes: 1 set Active Balancers note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.