Milwaukee M18 RedLithium XC 4.0Ah Battery Pack

The Milwaukee M18 REDLITHIUM XC 4.0Ah Extended Capacity Battery Pack is engineered to deliver the runtime and durability professionals demand on the jobsite. Its high-output cells and integrated frame withstand everyday impacts, while REDLINK™ Intelligence monitors each cell to ensure consistent, fade-free power from start to finish. An onboard fuel gauge provides at-a-glance charge status, so you can keep moving without guesswork—even in extreme conditions as low as 0°F.

Designed to power over 40 Milwaukee M18 cordless tools, this battery pack is compatible with both M18/M12 multi-voltage and M18 AC/DC chargers. Whether you’re drilling, cutting or fastening, the REDLITHIUM XC battery delivers extended runtime, long-term durability and all-weather performance so you can tackle the toughest jobs with confidence.

Key Features

• Extended 4.0 Ah capacity for longer runtimes
• Powers more than 40 Milwaukee M18 cordless tools
• REDLINK™ Intelligence for cell-level monitoring and even power distribution
• Onboard fuel gauge displays remaining charge
• Fade-free performance in extreme environments (below 0 °F)
• Compatible with M18/M12 multi-voltage and M18 AC/DC chargers