RIDGID 18 volt 8.0 Ah EXP lithium ion battery designed to deliver extended runtime and consistent power for demanding applications. This high capacity battery provides long lasting performance and advanced electronics for protection against overheating overloading and over discharge. Compatible with RIDGID 18 volt cordless tools this EXP battery is ideal for heavy duty jobs that require maximum runtime and reliability. A great upgrade for professionals and serious DIY users who want more power and longer use between charges.