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 :
Makita BL1041B 12V max CXT Lithium-Ion 4.0Ah Battery, Black - - Amazon.com