Battery Life (minutes)
(higher is better)
Even though all these Ultrabooks have comparable hardware and performance, our tests show a large discrepancy between the contenders. The Dell Latitude E7440, with its less power hungry i5 processor and lower resolution display, lasted well into the sixth hour, while both the HP Elitebook Folio 1040 G1 and Lenovo X1 Carbon pushed a little more than four hours. Powering a WQHD display certainly used up quite a lot of juice for the X1 Carbon. The Toshiba, with its 52Wh battery and slightly smaller 13.3-inch display lasted an hour more than the HP.