FirstPower Battery Adapter for Makita 18V Lithium-ion Power Tools,Convert Milwaukee 18V or Dewalt 20V Lithium-ion Battery to Makita 18V Lithium-ion Battery - - Amazon.com
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
Mellif MT20DL Battery Adapter for Makita to Dewalt 20v max 18v lithium – Mellif Tools
Amazon.com: Battery Adapter for Makita USB Charger Adapter, with 12V DC Port & USB Charger Work Light Compatible for Makita 10.8V-12V Lithium-ion Battery Converter with BL104 BL106 BL1021B BL1041B BL02 BL03 :
Battery Adapter For Makita 18V Li-ion battery to Dewalt 20V slide tools | eBay