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 :
VANON 2Pack BL1850B 5.0Ah 18V Replacement Battery for Makita 18v Battery Lithium Compatible with Makita 18 Volt Battery BL1815 BL1820 BL1830 BL1840 BL1850 - - Amazon.com
Amazon.com: Crtbelfy Battery Holder Mount for Makita 18V Battery Dock Holder Fit for BL1860 BL1850 BL1840 BL1830 Batteries - 5 Pack : Tools & Home Improvement
Amazon.com: 5.0 Ah bl1850b Replacement for Makita 18V Battery BL1850B BL1840B BL1830B BL1820B with Mount Holder, 4 Pack : Tools & Home Improvement
Amazon.com: Jialitt BL1860 6.0Ah Replacement Lithium-ion Battery for Makita 18V Battery BL1850B BL1850 BL1830 BL1840 BL1860 LXT Cordless Power Tools W/LED Indicator : Tools & Home Improvement
Amazon.com: Bonacell 2Pack 18V 3.5Ah Replacement for Makita 18V Battery Compatible with Makita 18 Volt Battery BL1860 BL1850 BL1840 BL1830 BL1820 BL1815 LXT 400 Power Tools : Tools & Home Improvement
Amazon.com: EID 150W Power Inverter Portable for Makita 18V BL1830 BL1850 Lithium Battery,DC 18V to AC 110V Outdoor Inverter with AC Outlet and Dual USB+200LM LED : Automotive
Amazon.com : Dosctt 2 Packs 18 Volt 3.0Ah BL1830B Replacement Battery Compatible with Makita 18V Battery Lithium BL1815 BL1820 BL1830 BL1840 BL1850 BL1860 LXT-400 : Tools & Home Improvement