Amazon.com: TURPOW 7.0Ah Replacement for Makita 18 Volt Battery BL1815 BL1830 BL1840 BL1850 BL1860 194205-3 LXT-400 for Makita 18Volt Batteries LXT Lithium ion Cordless Power Tools with 2 Packs Wall Mount Holder :
Makita USA - Product Details -BL1830B
18V LXT Lithium-Ion 3.0Ah Replace Battery for Makita BL1830 BL1840 18 Volt Tools - Walmart.com