Amazon.com: ARyee 18V 6.0Ah Replacement Battery for Makita 18V LXT Battery Compatible with BL1860 BL1850 BL1850B BL1845B BL1840 BL1840B BL1830 BL1820 BL1815 Lithium-ion : Tools & Home Improvement
Amazon.com: Amityke Battery Adapter,Power Wheels Adapter for Makita 18V/14.4V Battery BL1820, BL1830, BL1840, BL1850 with 14 awg Wires Power Convertor for DIY Ride On Truck, Robotics, RC Toys and Work Lights :
2Pack 5.0Ah Lithium-ion BL1850B Replacement for Makita 18V Battery Compatible with Makita 18 Volt Battery LXT BL1815 BL1830 BL1830B BL1835 BL1840 BL1850 BL1860 BL1860B - - Amazon.com
Amazon.com: Gamrombo 2Packs Upgraded to 6.0Ah 18V BL1860B Li-ion Replacement Battery Compatible with Makita 18V Battery BL1815 BL1830 BL1835 BL1840 BL1850 BL1860 LXT400 194205-3 Fit Cordless Power Tools : Tools & Home