Makita BL1840 18 V 4.0 Ah Li-ion Battery, Pack of 2 : Amazon.co.uk: 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: 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.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