Milwaukee Tool M18 REDLITHIUM XC5.0 Extended Capacity Battery Pack

All-weather performance: Delivers fade free power in extreme jobsite conditions Best-in-class construction: Offers long lasting performance and durability Fuel gauge onboard: Displays remaining runtime for less downtime on the job REDLINKâ„¢ Intelligence: Provides optimized performance and overload protection using total system communication between tool- battery and charger Versatility: Powers more than 60 Milwaukeer M18T cordless power tools