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
Amazon.com: BATTOOL 2 Pack 6500mAh BL1860 Replacement Lithium-ion Battery Compatible with Makita 18v Battery BL1850 BL1845 BL1840 BL1830 BL1820 BL1815 LXT400 194204-1 Cordless Power Tools : Tools & Home Improvement