MT20ML Battery Adapter Converter for Milwaukee M18 18V Lithium Battery Power Tools,Convert with Makita 18V,20V Battery BL1830 BL1840 BL1820 BL1815 for Milwaukee 18V Cordless Tool Power Source: Amazon.co.uk: DIY & Tools
DM18M for Dewalt Battery Adapter for Makita 18V Power Tools, TPDL Convert for Milwaukee 18V or for Dewalt 20V Li-ion Battery to Makita 18V Tool with USB Port: Amazon.co.uk: DIY & Tools