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 :
Rocivic Replacement for Makita 18V Battery 5Ah 2 Packs, Compatible with Makita BL1820B BL1830B BL1840B BL1850B BL1860B 18V Cordless Power Tools, with LED Indicator - - Amazon.com
Amazon.com: Upgraded to 6.0Ah 18V BL1860B Replacement for Makita Battery 18v Compatible with Makita 18 Volt Battery Lithium with LED Indicator BL1860 BL1815 BL1820 BL1830 BL1840 BL1850 LXT-400 Power Tools : Tools