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 &
Amazon.com: Alian MT18GL Battery Adapter for Craftsman Power Tools, for Makita 18V Lithium ion Battery Convert to only for Craftsman C3 19.2 Volt Battery (Can't for 20V Battery),with USB Cordless Battery Adapter :
adapter for dewalt 20V and milwaukee M18 18 Battery for makita 18 LXT tool use | eBay
Battery Adapter for Makita 18V Lithium-ion Power Tools,for Convert Milwaukee 18V or Dewalt 20V Lithium-ion Battery to Makita 18V Lithium-ion Battery Black - Walmart.com