Battery Adapter for Makita 18V Li-ion Battery Convert for DeWalt 18V/20V MT20DL | eBay
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