18 Volt BL1860B Replacement Lithium-ion Battery Compatible with Makita 18V Battery BL1860 BL1850 BL1850B BL1840 BL1840B BL1830 BL1830B BL1815 BL1815B LXT-400 with LED Indicator 2 Packs - - Amazon.com
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 :
Amazon.com: MechanicAnts MA21007 Lithium-Ion 20V MAX 4.0Ah Battery for All Power Tools, Compatible with Makita BL1840 : 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