The DeWalt DCBP034 18V Powerstack Compact Battery utilizes revolutionary stacked pouch battery cell technology, offering 50% more power and a 25% smaller size for improved maneuverability in tight spaces. It weighs 15% less than previous models, making overhead work more comfortable. This battery features low impedance construction for increased power and superior thermal performance, leading to more recharge cycles. It is compatible with all 18V DeWalt tools and comes in a twin pack.