REDLINK™ Intelligence: Provides optimized performance and overload protection using total system communication between tool, battery and charger. Best-in-class construction: Offers long-lasting performance and durability. FUEL gauge onboard: Displays remaining runtime for less downtime on the job. All-weather performance: Delivers fade-free power in extreme jobsite conditions. Versatility: Powers more than 40 Milwaukee M18™ cordless power tools.