Amazon.com: 2 Packs Replace for Makita 18V Battery 6.0Ah, Replacement Makita 18 Volt BL1860B Batteries BL1820B 1830B 1840B 1850B, Compatible with Makita 18v Tools, Fit with Original Makita 18v Battery Charger :
Rocivic Replacement for Makita 18V Battery 5.0Ah 2 Packs, Compatible with Makita BL1820B BL1830B BL1840B BL1850B BL1860B 18V Cordless Power Tools, with LED Indicator - - Amazon.com
Amazon.com: TeenPower Replacement for Makita 18V Battery 6.0 Ah 8/pk Compatible with Makita Tools BL1815 BL1830 BL1835 BL1840 BL1850 BL1860 : Tools & Home Improvement
Amazon.com: Upgraded to 9.0Ah 1 Pack Lithium Ion Battery Replacement for Makita 18V Battery BL1860 BL1830 BL1840 BL1850 BL1850B LXT-400 with LED Indicator Compatible with All Makita 18V Cordless Power Tools :
Amazon.com: TREE.NB 18V 6.0Ah Lithium Ion Battery Replacement for Makit BL1815, BL1830, BL1835, BL1840, BL1850, BL1860, LXT400, 194204-5, 194205-3, 194230-4, 194309-1 (6000mAh 18V) : Health & Household