Milwaukee M18 REDLITHIUM XC4.0 Extended Capacity Battery Pack

The milwaukee 48‑11‑1840 M18 REDLITHIUM XC4.0 delivers red lithium xc 4.0 extended runtime and up to 20 % more power than standard lithium‑ion packs. Designed for professional users, it runs cooler and operates down to −18 °C, ensuring fade‑free output in extreme conditions. Integrated REDLINK™ intelligence protects against overload and cell drift. Rugged construction resists impact and vibration, while it remains fully compatible with all M18 tools.

• Extended Runtime XC4.0



Offers up to twice the runtime of standard packs for prolonged jobsite performance.




• 20 % More Power



Delivers more consistent output under load compared to standard capacities.




• Onboard Fuel Gauge



LED indicator displays remaining runtime clearly during use.




• REDLINK™ Intelligent Protection



System communication between tool, battery, and charger prevents overload and extends battery life.




• Extreme Climate Durability



Cools efficiently and delivers fade‑free power even at 0 °F (−18 °C) or below.

This product uses lithium‑ion chemistry and may present fire or chemical hazards if damaged, over‑charged, improperly stored, or exposed to excessive heat. Always follow Milwaukee’s safety instructions and handling guidelines.