DM18RL Adapter Converter, Battery Adapter for Dewalt for Milwaukee M18 18V/20V Lithium ion Batteries Convert to for Ryobi P108 18V Li-ion NI-CD NI-MH ABP1801 Battery, with USB Port - - Amazon.com
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
Amazon.com: Battery Adapter Converter for Makita 18V Lithium-Ion Battery BL1830B BL1850B BL1860B Convert to Milwaukee 18V M18 Lithium Battery, Compatible with Milwaukee 18-Volt M18 Lithium Ion Cordless Tool Use : Tools &