2Pack BL1840B 4.0Ah 18V Replacement Battery for Makita 18v Battery Lithium Compatible with Makita 18 Volt Battery BL1815 BL1820 BL1830 BL1840 BL1850 - - Amazon.com
VANTTECH Pack of 2 BL1860B 18V 6.0Ah Li-Ion Replacement Battery for Makita Battery BL1860 BL1850B BL1850 BL1840B BL1840 BL1830 194205-3 LXT-400 with LED Indicator: Amazon.de: DIY & Tools
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.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