Amazon.com: 2 Packs 3.0Ah 18 Volt BL1830 Battery Replacement for Makita 18V Battery Lithium Ion BL1815 BL1820 BL1830B BL1840 BL1850 BL1860 BL1860B LXT-400 Cordless Power Tools Batteries : 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 :
Amazon.com: MT20DL Battery Adapter for Makita 18V BL1830 BL1860 BL1815 Li-ion Battery Convert for Dewalt 18V 20V DCB200 Li-ion Battery