With a 12.5-inch screen size and 13-hour battery life, the Lenovo ThinkPad X220 is highly portable and will keep operating as long as you need it. The smaller size does not equate to less power or quality; the 1366 x 768 screen resolution means that you'll be able to see all the important details on your screen in impressive detail. This Lenovo notebook with Windows 7 has 320 GB of hard drive storage and comes standard with 4 GB of RAM, which can be upgraded to 8 GB for those who want faster processing power. The solid black case of this lightweight computer keeps your appearance professional wherever you go, and the Intel Core i5-2540M 2.60 GHz processor keeps all your tasks flowing smoothly.