PORTER-CABLE PC18BLEX 18-Volt Lithium-Ion Cordless EX Battery 2 Pack (Bulk Packaged) Two 18 Volt EX Lithium-Ion 2.6 Ah Batteries Twice as much run time as a PORTER-CABLE 18-volt LX pack Compatible with any 18-volt PORTER-CABLE cordless tool Extended performance in a lightweight, compact pack