PORTER-CABLE PC18BLX 18-Volt Lithium-Ion Cordless LX Battery Pack The LX lithium-ion battery offers more runtime than a standard P-C Lithium battery, giving extended performance in a lightweight, compact pack lithium-ion batteries hold charge for extended periods, so packs are ready to go even after being stored for extended periods Compatible with any 18-volt Porter Cable cordless tool, meaning 1 battery can power all your needs Compatible with any 18V PORTER-CABLE cordless tool