The Milwaukee M12 Redlithium high output XC5.0 battery pack delivers 25 percent more power and runs 25 percent cooler than other Milwaukee M12 Redlithium XC battery packs. The increase in power elevates the performance of the entire Milwaukee M12 system and drives the next breakthrough in M12 fuel. The lithium-ion battery delivers fade-free power and runs substantially cooler through demanding applications, allowing you to push your cordless power tools throughout a wide range of applications. Each battery pack is built for heavy duty use, runs cooler, and performs in climates below 0°F/-18°C. In addition, the M12 Redlithium high output XC5.0 is built with a resistant housing, increasing the protection against exposure to common oils, greases, and solvents found in transportation maintenance and manufacturing environments.