DeWalt DC9071 12 Volt Battery Pack (028877480985-2)
Amazon.com: 12 volt battery for dewalt drill
DEWALT 12-Volt Power Tool Battery Kit
ANTRobut 5.0Ah Replacement for Dewalt 20V Battery and Charger Kit DCB205 DCB204 Lithium-Ion 20 Volt Max Battery and Replacement Dewalt Battery Charger DC118 DCB112 for 12V-20V Battery - - Amazon.com
DEWALT 20-Volt Max 2-Pack 2 Amp-Hour Lithium Power Tool Battery Adapter Kit (Charger Included) in the Power Tool Batteries & Chargers department at Lowes.com