Delivers up to 2.5X more run-time than standard lithium. Provides more delivered energy than any 18 V pack on the market. Delivers up to 20% more power than standard lithium. Faster application speed & increased application range. Provides more work over the life of the pack than any 18 V pack on the market. REDLITHIUM Protection prevents pack failure from vibration or drops, routes water away from critical components and out of the pack, minimizes heat to extend run-time & life, operates below -18C/0F. Forward and backward compatible with 60+ M18 tools.FeaturesREDLINK Intelligence: provides optimized performance and overload protection using total system communication between tool, battery and chargerBest-in-class construction: offers long-lasting performance and durabilityFuel gauge Onboard: displays remaining runtime for less downtime on the jobAll-weather performance: delivers fade free power in extreme jobsite conditionsVersatility: powers more than 60 Milwaukee M18 cordless power toolsREDLINK INTELLIGENCE: individual cell monitoring - ensures optimal charge and discharge for maximum life