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 :
Amazon.com: 300W Power Inverter for Makita 18V Battery 6.0Ah, 110V AC Power Inverter Compatible with Makita 18 Volt Battery BL1860 BL1860B BL1850B BL1850 Series Battery, Replacement Battery for Makita 18V Tools :
Makita BL1850-2 18-volt LXT Lithium-Ion 5.0Ah Battery, 2-Pack- Discontinued by Manufacturer (Discontinued by Manufacturer) - Amazon.com