Amazon.com: 21V Lithium Battery - EKACO 4.0Ah Li-ion Battery Long Life Battery Work with Cordless Leaf Blower, for Makita Power Tools BL1860B BL1850 BL1840 BL1850B-2 BL1845 BL1830 BL1820 BL1815 LXT-400 Series :
Amazon.com: BL1830 BL1840 Replacement 18V 3000mAh Battery for Makita 18V LXT Lithium-Ion BL1815 BL1830 BL1835 BL1840 BL1845 BL1850 BL1860 LXT400 Cordless Power Tools Battery : Tools & Home Improvement
2Pack BL1840B 4.0Ah 18V Replacement Battery for Makita 18v Battery Lithium Compatible with Makita 18 Volt Battery BL1815 BL1820 BL1830 BL1840 BL1850 - - Amazon.com
MT20DL Battery Adapter, Convert for Makita 18V Li-ion Battery to for DeWalt 18V/20V Lithium-Ion Tool Battery Adapter, Use for DeWalt 18V/20V Max Li-ion Cordless Power Tools - - Amazon.com