Synergy Digital Power Tool Battery, Compatible with DeWalt DC9180, DC9180C, DC9182 Power Tool Battery (Li-ion, 18V, 4000mAh) - Walmart.com
Amazon.com: JJXNDO 1-Pack DM18D Upgraded Version DCA1820 Converter for Dewalt 18V/20V & for Milwaukee M18 18V Battery to Work for Dewalt 18V Nicad&NiMh Battery Tool(Convert Lithium Battery to Nicad/Nimh Battery) : Tools