Rocivic Replace for makita 18V Battery 5.0Ah 2 Packs, Replacement for Makita 18 Volt Battery BL1850B BL1840B BL1860B, Compatible with Makita 18V Cordless Power Tools and Charger, with LED Indicator - Amazon.com
Makita to Ryobi One+ 18V Battery Adapter
Makita BL1850B-2 18V 5.0Ah Lithium-Ion Battery - Black (2-Pack) for sale online | eBay