Amazon.com: 2Packs Upgraded 5.0Ah 18V BL1850B with LED Replacement Lithium-ion Battery Compatible with Makita 18 Volt Battery for Compatible Makita 18V Lithium-Ion Cordless Power Tools : Tools & Home Improvement
18v battery for makita drill BL1850 BL1850B BL1840 BL1860 all 18v for makita batteries interchangeable - AliExpress
Mrupoo 18V 5Ah BL1850b Replacement Battery with LED Indicator Compatible with Makita 18V BL1830B BL1860B BL1820,2-Pack - Walmart.com