18V 5.0ah Bl1850b Replacement Battery Compatible with Makita 18volt Bl1830b Bl1860b Bl1820 Bl1850 Bl1860 Bl1840 Bl1815 Lxt-400 with LED Power Display - China LiFePO4 Batteries, Lithium Ion Battery | Made-in-China.com
Makita OEM (1) DC18RC Charger & (2) BL1840 4.0 Ah Batteries with (1) plastic cover NEW - - Amazon.com
MAKITA 18V BL1840 4AH BATTERY LATEST STAR VERSION LED BATTERY INDICATOR - SINGLE | eBay
Makita 18V LXT Lithium-Ion High Capacity Battery Pack 4.0Ah with LED Charge Level Indicator (2-Pack) BL1840B-2 - The Home Depot