M12 REDLITHIUM XC6.0 Battery delivers up to 3 times more runtime, 20% more power and 2 times more recharges than standard lithium-ion batteries. The lithium-ion battery pack features superior pack construction, electronics, and performance giving more work per charge and more work over pack life than any battery on the market. The rechargeable battery also offers 5.0 amp-hours of runtime. Each battery pack is durably built for heavy-duty use, runs cooler, and performs in climates below 0 F/-18 C. It's compact, lightweight design allows for working in tight work spaces and reduces fatigue. Built-in REDLINK Intelligence protects the battery from overloads, preventing damage to cordless power tools in heavy-duty situations, while the discharge protection prevents cell damage. An integrated temperature management system and individual cell monitoring help to maximize battery's life. REDLITHIUM XC6.0 Battery Pack instantly upgrades the runtime and durability of Milwaukee M12 cordless tools.