Porter Cable PC18BLEx 18V Ex Lithium Ion Battery Pack: * Battery pack * Rechargeable * Offers more runtime than a standard PC lithium ion battery * Giving extended performance in a lightweight, compact pack * Holds a charge longer, so packs are ready to go even after being stored for extended periods * Compatible with 18-volt porter cable cordless tool, meaning 1 battery can power all of your tools * 18-volt