This Milwaukee M12 2.0Ah REDLITHIUM-ION Battery Starter Kit includes one 12 Volt M12 C12C Li-ion Charger with a compact and lightweight design for extended runtime and power. Its advanced electronics eliminate memory effect, allowing charging at any time without capacity reduction. The kit also features a 12 Volt M12 B2 REDLITHIUM-ION 2.0Ah Battery Pack equipped with REDLINK Intelligence and overload protection to safeguard your tools. The battery incorporates a temperature management system to maintain optimal temperature for maximum lifespan. The battery provides constant fade-free power and recharges in 40 minutes or less.