Makita 18V LXT Lithium-Ion High Capacity Battery Pack 4.0Ah with Fuel Gauge and Charger Starter Kit BL1840BDC1 - The Home Depot
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 :
Newest 18V 4Ah 5Ah 6Ah Li ion Battery For Makita 18V Battery BL1860 BL1850 BL1830 BL1840 194205 3 Power Tool With LED Indicator|Replacement Batteries| - AliExpress
Makita XOB01Z 18V LXT Random Orbit Sander & BL1840BDC1 Battery 4Ah Bundle New 686024803065 | eBay
Battery Case Charging Protection PCB Board Set for MAKITA 18V 3Ah/4Ah/5Ah/6Ah | eBay