M12 12-Volt Lithium-Ion XC Battery Pack 4.0 Ah and Charger Starter Kit

Milwaukee M12 REDLITHIUM™ 4.0 Battery Pack

Power through your day with up to 2X more runtime and 20% more power than standard Lithium-Ion batteries. Built for all M12 cordless tools, this next-gen REDLITHIUM™ battery delivers consistent, fade-free power—even in extreme temperatures down to -18°C (0°F). Durable, reliable, and ready for any jobsite.