Amazon.com: 18V Battery Adapter for Hitachi to for Makita Lithium Battery, DC DC 18V Battery Converter for Electric Tools, No Need Buy One More Battery : Tools & Home Improvement
Battery Adapter for Makita 18V to Einhell/Ozito 18V Li-ion Battery Converter Power Tool Accessories Tools Electric Drill - AliExpress
Battery Adapter Converter for Milwaukee M18 Battery to Einhell Power X-Change 18V Battery,Work With Einhell 18V Slide Style Tools : Amazon.ae: Tools & Home Improvement