The 20V MAX DEWALT POWERSTACK Compact Battery is 50% more powerful, 25% more compact, and 15% lighter**. This battery features an impact-resistant, rubber overmold base and utilizes revolutionary pouch cell battery technology to provide twice the lifetime**. Engineered to get into tight spaces without sacrificing performance, our most powerful, most compact, and lightest weight battery** is compatible with the 20V MAX* tools and chargers you already own.