Amazon.com: Adapter Converter for Makita 18V BL1860 BL1850 BL1840 Li-ion Battery to Ridgid AEG 18V Hyper li-ion Power Tool Battery : Tools & Home Improvement
Makita USA - Product Details -BL1014
Amazon.com : 2Packs Upgraded 6.0Ah 18V BL1860B Replacement Lithium-ion Battery Compatible with Makita 18 Volt Battery with LED Indicator BL1860 BL1850 BL1840 BL1820 BL1815B LXT400 Cordless Power Tools : Tools & Home