Amazon.com: 【Upgrade】 CaliHutt 18V 6.0Ah Replacement Battery for Makita 18V Battery with LED Indicator BL1830 BL1850 BL1840 BL1850B-2 BL1845 BL1815 BL1820 LXT-400 LXT Cordless Power Tools Lithium-ion Battery : Tools & Home
Amazon.com: Akkucore 18V 6000mAh Battery Replacement for Makita 18V BL1850B High Capacity Lithium-ion Battery Compatible with BL1860 BL1860B BL1850 BL1840 BL1840B BL1830 BL1830B BL1815 BL1815B LXT-400 4Pack : Tools & Home Improvement
Amazon.com: Battery Charger Compatible with Makita 14.4V/18V Lithium-ion Battery,3.5A DC18RC Battery Replacement Charger with LCD Screen Charging for BL1830 BL1815 BL1430 BL1850 BL1840B BL1820 BL1860 BL1450 : Tools & Home Improvement
Amazon.com : ARyee 2Pack Upgrade 18V 5.0Ah Li-ion Battery Replacement for Makita Lithium-Ion Battery Compatible with Makita BL1840 BL1850 LXT-400 BL1860 BL1815 BL1830 : 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 :