Black & Decker FSB18 FireStorm 18-Volt NiCad Slide Style Battery Compatible with all spring-loaded style Firestorm and Black and Decker 18-volt cordless products Rough and tough plastic housing for durability Lets you tackle yard clean-up jobs wirelessly Dimensions: 5.5 x 3.0 x 3.0 inches; weighs 3.0 pounds Includes a 2-year warranty