1X 18V 4.0Ah Battery for Milwaukee M18 48-11-1852. Versatility: powers more than 100 Milwaukee M18 cordless power tools. Compatible Band: For MILWAUKEE. For Milwaukee 48-11-1811, 48-11-1815, 48-11-1820, 48-11-1822, 48-11-1828, 48-11-1840, 48-11-1841, 48-11-1850, 48-11-1852, 48-11-1890 48-11-1860 48-59-181, 48-59-1850.