makita bl1850 18-volt lxt lithium-ion 5.0ah battery (discontinued by manufacturer)
Amazon.com: Dasnite BL1850B 18V 5.0Ah Battery and DC18RC Charger Replacement for Battery BL1850 BL1860 BL1840 BL1850B-2 BL1845 BL1830 BL1815 BL1820 BL1860B LXT-400, Charger for 14.4V-18V LXT Batteries : Tools & Home Improvement
Amazon.com: Adapter Converter for Makita 18V BL1860 BL1850 BL1840 Li-ion Battery to Ridgid AEG 18V Hyper li-ion Power Tool Battery : Tools & Home Improvement
Waitley 18V 9.0Ah Battery for Makita Power Tool BL1830 BL1840 BL1850 BL1860 1890 18 v 18Volt 9000mAh Lithium Ion Replacement 9A|Replacement Batteries| - AliExpress
2Pack 5.0Ah Lithium-ion BL1850B Replacement for Makita 18V Battery Compatible with Makita 18 Volt Battery LXT BL1815 BL1830 BL1830B BL1835 BL1840 BL1850 BL1860 BL1860B - - Amazon.com
9.0Ah 18V 18 Volt Battery Pack for Makita LXT BL1860B BL1850 BL1890B LITHIUM ION | eBay
Bonacell Bl1850 For Makita 18v Battery Replacement For Makita Bl1830 Bl1860 Bl1840 Bl1840b Bl1850 Bl1860b Power Tools - Rechargeable Batteries - AliExpress