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: 18V 7.0Ah Lithium Replacement for Makita 18V Battery Compatible with BL1815 Lxt BL1860 BL1820 1830B 1840B 1850B with Portable 27W 2000LM LED Work Light for Makita 18 Volt Battery : Tools