DEWALT 18V to 20V MAX Lithium-Ion Battery Adapter Kit (2 Pack) DCA2203C - The Home Depot
Amazon.com: Adapter for DeWalt to Milwaukee Battery, for 20V 60V DeWalt Lithium Battery to 18V Milwaukee M18 Lithium Battery (Adapter only) : Tools & Home Improvement
Parkside X20 to Dewalt XR 18v Battery ADAPTER - Etsy
Power Battery Adapter Battery Converter For Milwaukee M18 18v Battery Or For Dewalt 18v-20v Battery To Become Makita 18v Battery - Battery Accessories & Charger Accessories - AliExpress