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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
Makita 18V 4.0Ah Li-Ion LXT Battery BL1840 196399-0 Star Genuine UK : Amazon.co.uk: DIY & Tools
Amazon.com: Ibanti 6.0Ah BL1860B Replacement Battery Compatible with Makita 18V Li-ion Battery BL1815 BL1830 BL1835 BL1840 BL1850 BL1860 Compatible with Makita 18 Volt Power Tools 2Packs : Tools & Home Improvement