2Packs 6500mAh M18 Battery Compatible with Milwaukee 18V Battery for 48-11-1820 48-11-1850 48-11-1828 48-11-10 48-11-1815 48-11-1852 48-11-1822 48-11-1811 48-11-1840 Cordless Power Tools Batteries - - Amazon.com
Milwaukee M18 18-Volt 4 Gal. Lithium-Ion Cordless Switch Tank Backpack Water Supply Kit with Battery, Charger & (4)Tank Assemblies 2820-21WS-49-16-28WS-49-16-28WS-49-16-28 - The Home Depot
Milwaukee Battery Comparison | Milwaukee M12, M18 FUEL Batteries & More | Construction Fasteners and Tools