Amazon.com : LabTEC BL1860 6000mAh Replacement 18V Lithium Battery Compatible with Makita 18V BL1860B BL1850 BL1840 BL1845 BL1830 BL1820 BL1815 LXT-400 Cordless Power Tools Batteries with LED Indicator (2 Packs) : Tools
Amazon.com: Battery Adapter Converter for Makita BL1850 BL1860 18V Battery to Worx 20V WA3520 WA3525 WA3575 WA3578 Power Tool Battery : Tools & Home Improvement
Makita GEC01PL4 14" Power Cutting Kit - includes four batteries, rapid optimal dual charger and Makita GEC01 Power Cutter.
Amazon.com: Dosctt 18 Volt 12Ah Lithium ion Replacement for Makita 18V Battery BL1860B BL1860 BL1850B BL1850 BL1840B BL1840 BL1830B BL1830 BL1815 with LED Indicator : Tools & Home Improvement