The MILWAUKEE® M12 REDLITHIUM™ HIGH OUTPUT™XC5.0 and CP2.5 batteries provide you with 25% more power and run 25% cooler than standard M12 REDLITHIUM™ XC and CP battery packs. The increase in power elevates the performance of the entire M12™ system and drives the next breakthrough in M12 FUEL™. The M12 REDLITHIUM™ HIGH OUTPUT™ XC5.0 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. The M12 REDLITHIUM™ HIGH OUTPUT™ CP2.5 gives you the same power and runtime of an M12 REDLITHIUM™ XC battery in a lighter and more compact package. Each battery pack is durably built for heavy-duty use, runs cooler, and performs in climates below 0°F/-18°C. In addition, these Milwaukee high output batteries are built with a resistant housing, providing increased protection against exposure to common oils, greases, and solvents found in automotive and manufacturing environments. Both batteries are fully compatible with all M12™ tools.