Battery Adapter for DEWALT or Milwaukee conversion to Makita Batteries MAKITA Power Tool Accessories Replaces Bl1850 with USB - AliExpress
Amazon.com: T TOVIA Battery Adapter for Dewalt 20V & for Milwaukee 18V Battery to MAKITA 18V LXT Lithium-Ion Battery with 5V/2.1A USB Output Port, Work for Makita Power Tools (Adapter only) :