The MILWAUKEE® M12™ REDLITHIUM™ 3 Pack Battery Kit includes an XC6.0 Battery that delivers up to 3X more runtime, 20% more power, and 2X more recharges than standard lithium-ion batteries. The M12™ REDLITHIUM™ XC4.0 Battery delivers up to 2X more runtime, 20% more power, and 2X more recharges than standard lithium-ion batteries. The M12™ REDLITHIUM™ CP2.0 Battery delivers up to 2X more runtime, 20% more power and 2X more recharges than standard lithium-ion batteries. The lithium-ion battery pack features superior pack construction, electronics, and performance for more work per charge and more work over pack life than any battery on the market. Each battery pack is durably built for heavy-duty use, runs cooler, and performs in climates below 0°F/-18°C. Its compact, lightweight design allows for work in tight workspaces 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 maximize the battery's life.