Milwaukee 48-11-1840 18-Volt M18 Red Lithium Xc 4.0 Ah Battery Packs

Fits more than 40 Milwaukee M18 tools, On-board gauge displays charge, REDLINK Intelligence ensures even distribution between cells, prevents overloads, Withstands environments colder than 0°F and -18°C, Versatility: powers more than 40 Milwaukee M18 cordless power tools