DEWALT 14.4-volt 1/2-in Drill (Charger Included) at Lowes.com
Upgrade Dewalt 14.4v Drill to Use 18v Battery : 3 Steps - Instructables
Replacement 6.8Ah Dewalt 14.4 Volt XRP Battery Pack for DC9091 DW9091 DW9094 DE9031 DE9038 DE9091 DE9092 Cordless Power Tools| | - AliExpress
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
How to Rebuild a Dewalt 14.4v Battery Pack : 9 Steps (with Pictures) - Instructables