Amazon.com: Synergy Digital Power Tool Battery, Compatible with Makita BTM50RFE Power Tool, (Li-ion, 18V, 7500mAh) Ultra High Capacity, Replacement for Makita BL1815 Battery : Tools & Home Improvement
Amazon.com: Xaocaige 3.0ah BL1830 Replacement for Makita 18V Battery LXT Lithium-ion Compatible with 18 Volt Makita Battery BL1815 BL1820 BL1820b BL1830 BL1830b BL1840 BL1840b BL1850 BL1850b fit Cordless Tools : Tools &
Waitley 18V 9.0Ah Battery for Makita Power Tool BL1830 BL1840 BL1850 BL1860 1890 18 v 18Volt 9000mAh Lithium-Ion Replacement 9A - AliExpress