The Milwaukee M18 Redlithium High Output 18V 8AH Battery 48-11-1880 is a powerful and reliable battery pack designed for use with Milwaukee M18 tools. With its 18V voltage and 8.0Ah capacity, this lithium-ion battery delivers fade-free power and runs substantially cooler through heavy applications. It provides 50% more power and runs 50% cooler compared to other Milwaukee M18 REDLITHIUM XC battery packs, making it a great solution for a wide range of M18 products. The battery is also compatible with all 175+ Milwaukee M18 solutions and offers increased power in extreme-cold weather conditions.