Amazon.com: Adnmroku 2Packs 18V 4.0Ah BL1840B Replacement Battery Compatible with Makita BL1830 BL1840 BL1850 BL1860 BL1860B LXT Cordless Power Tools Batteries : Tools & Home Improvement
Makita BL1041B 12V max CXT Lithium-Ion 4.0Ah Battery, Black - - Amazon.com
Amazon.com: 2 Packs 18V 6.0Ah BL1860B Battery Replacement for Makita 18v Battery Lithium BL1815 BL1820 BL1830 BL1840 BL1850 LXT-400 Cordless Power Tools Batteries with LED Indicator : Tools & Home Improvement
Amazon.com: MechanicAnts MA21007 Lithium-Ion 20V MAX 4.0Ah Battery for All MechanicAnts Power Tools, Compatible with Makita BL1840 : Tools & Home Improvement