Includes 12V NiCD Spring-Loaded Slide Pack Battery - HPB12Designed to maintain power after extensive use without continual recharging, the HPB12 12-Volt battery from Black and Decker is compatible with all spring-loaded battery style Firestorm and Black and Decker 12-volt tools. Lightweight, longlasting, and efficient, this NiCad battery boasts "zero memory" technology and supplies up to 500 recharges. The HPB12 is also a snap to install and remove from any tool, thanks to its sliding connecting feature. For added peace of mind, it comes with a 2-year warranty.