Amazon.co.jp: Makita BL1840 Compatible Battery, 18 V, 4,000 mAh, Large Capacity, Lithium Ion Battery, Compatible with BL1830, BL1840, BL1850, BL1860, Set of 2 : Electronics
Amazon.co.jp: Powilling Makita 18 V Compatible Battery, Makita BL1860B Battery, 18 V, 6.0 Ah, Battery for Makita Electric Tools, BL1860B, BL1860, BL1815, BL1820, BL1830, BL1840, BL1850, BL1870, BL1890, etc. [Set of 4]
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
Amazon.com: BL1830 BL1840 Replacement 18V 3000mAh Battery for Makita 18V LXT Lithium-Ion BL1815 BL1830 BL1835 BL1840 BL1845 BL1850 BL1860 LXT400 Cordless Power Tools Battery : Tools & Home Improvement