DeWALT DCA1820 18V to 20V Lithium-Ion Battery Adapter for 18-Volt Tools
DEWALT 18-Volt 2-Pack 2.4 Amp-Hour; 2.4 Amp-Hour Nickel Cadmium (Nicd) Power Tool Battery Kit in the Power Tool Batteries & Chargers department at Lowes.com
DeWalt 4.0Ah DCB204 vs DCB182 Battery Packs - Pro Tool Reviews