MT20DL Battery Adapter, Convert for Makita 18V Li-ion Battery to for DeWalt 18V/20V Lithium-Ion Tool Battery Adapter, Use for DeWalt 18V/20V Max Li-ion Cordless Power Tools - - Amazon.com
Battery Adapter Converter For Dewalt 18v / 20v Li-ion Dcb200/201/202/203/204 Li-ion Battery To Bosch Adapter 18v Accessories - Power Tool Accessories - AliExpress
ExpertPower Replacement Battery for DeWalt DC9182, DC9181, DC9180, 18V XRP Lithium Ion fits All Dewalt 18 Volt Tools - - Amazon.com
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