For Makita Battery 5000 mAh 18 V Makita Battery 5.0 Ah BL1850b BL1840 Replacement Battery 18V for Makita BL1850 BL1830 BL1840 BL1815: 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