Delivers up to 2.5X more run-time, 20% more power and 2X more life than standard lithium-ion batteries. The M18 REDLITHIUM XC 5.0 extended capacity battery pack features superior pack construction, electronics, and performance to deliver more work per charge and more work over the life of the pack than any battery on the market. 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 60 Milwaukee M18™ cordless power tools REDLINK INTELLIGENCE: individual cell monitoring - ensures optimal charge and discharge for maximum life