Features: Engineered for 21700 DC18V21V 150A tools, this highly power lithium batteries protections board delivers 150A discharge current to maintain stable operate of professional equipment, resolving voltages drop issues in conventional boards during peakly loads. Features intelligent temperature control to prevent overheating and built in cell balancing technology that optimizes charging distribution across battery units, enhancing efficiency and lifespans through premium PCB construction. Ideal for technicians, contractors, and industrial users requiring reliability high current output for power tools, electric vehicles, and heavy duty machinery in demanding environments. Performs optimally in extreme conditions like construction sites, automotive workshops, and outdoor operations where sustained power delivery and thermal management are critical. Its corrosions resistant PCB design ensures long term durability while simplified installation saves time, making it a versatile upgrade for 21700 DC18V21V 150A battery systems needing robust performances and safety. Specifications: Component: PCB Size:Approx.10x7cm/3.94x2.76inch for 21700 DC18V21V 150A Battery Supports 150A high current protections, overcharge, over-discharge, over-current, short circuit protections functions, Package Includes: 1pc Battery protections Board 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.