Amazon.com: Upgrade 3.0Ah 18 Volt BL1815 Lithium Ion Battery Replacement for Makita 18V Battery BL1815 BL1830 BL1860 BL1850 BL1840 BL1850B-2 BL1845 BL1815 BL1820 BL1860B with LED Indicator : 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 : AMICROSS 18V Battery 9.0Ah Replacement for Makita 18V Battery BL1830 BL1850 BL1860, with Stealth Mount Holder, Compatible with 18 Volt Tools XMT03Z DMP180ZX HU02Z XAG04Z and DC18RC DC18RD DC18SD :
Amazon.com: Fancy Buying CO. [2Pack] Lithium-Ion Battery BL1815 BL1820 BL1830 BL1840 BL1845 BL1850 BL1860 LXT-400 Replacement for Makita 18V 6.0Ah LXT Cordless Power Tools : Tools & Home Improvement