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
18V Battery BL1840 BL1830 Super Fast Charger for All Makita BL1860 BL1850 BL1820 BL1815 LXT-400 194205-3 194204-5 BL1830B BL1830B-2 BL1850-2 BL1850B BL1850B-2 with LED Screen, USB Port - Amazon.com