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
Eagglew BL1860B Replacement Battery Lithium ion 6.0Ah 18V Compatible with Makita 18 Volt BatteryBL1860 BL1850 BL1840 BL1820 BL1815B LXT400 with LED Indicator Cordless Power Tools 2Pack - - Amazon.com