The Milwaukee M12 REDLITHIUM CP 2.0 & XC 4.0 batteries deliver up to two times more runtime， 20% more power and two times more recharges than standard lithium-ion batteries. The rechargeable battery also delivers 2.0 Ah of runtime. The extended-capacity battery delivers 4 Ah (48-watt-hour) of run time， even in sub-zero temperatures. The lithium-ion battery pack features superior pack construction， electronics and performance to provide more work per charge. Each battery pack is durably built for heavy-duty use， runs cooler and performs in climates below 0F/minus 18 degrees C. Its compact， lightweight design allows users to work in tight work spaces and reduces fatigue. Built-in REDLINK Intelligence protects the battery from overloads and preventing users from damaging their cordless power tools in heavy-duty situations. The discharge protection prevents cell damage. An integrated temperature management system and individual cell monitoring help to maximize battery life.

• 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
• All-weather performance: delivers fade-free power in extreme jobsite conditions
• Powers more than 100+ Milwaukee M12 cordless power tools
• Compatible with all Milwaukee M12 lithium-ion tools and chargers (sold separately)
• Includes: four M12 12-Volt lithium-ion 2.0 Ah compact battery packs (48-11-2420) and four M12 12-Volt lithium-ion XC extended capacity battery pack 4.0 Ah (48-11-2440)
• 3-year limited warranty