DM18M Battery Adapter for Milwaukee to Makita Battery, for Milwaukee 18V for Dewalt 20V Battery Convert to for Makita 18V Battery - Walmart.com
Amazon.com: for Makita to Dewalt Battery Adapter, Compatible with Makita 18v Lithium Battery, Convert to Dewalt 18v-20v Lithium Batteries, Converter MT20DL Use with Dewalt 18v-20v Cordless Power Tools : Tools & Home