Amazon.com : for Battery Adapter DM18M for Dewalt 20V Convert to for Makita 18V Lithium BL1830 BL1840 BL1850 14.4V- 18V Battery : Tools & Home Improvement
DM18M Adapter converts for Dewalt 20V Lithium Battery and for Milwaukee 18V M18 Lithium Battery to for Makita 18V Lithium Battery BL1830 BL1840 BL1850 - Amazon.com
Battery Adapter suitable for DeWalt & Milwaukee 20 V Li-Ion batteries , Makita 18 V Li-Ion Tools | 888200682
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