Toshiba Satellite U845: Ultrabooks Go Mainstreamby Vivek Gowri on October 8, 2012 5:00 PM EST
Battery life is decent but by no means stellar given the rest of the Ultrabook class. The battery is a 54Wh 6-cell Li-ion (not lithium polymer, it should be noted) pack of the sealed-in, non-removable variety. Our battery life testing showed a hair over six hours in the internet benchmark and an idle life of close to eight hours. You can reliably expect at least 5.5-6 hours of runtime in light usage scenarios, about average for 14” Ultrabooks but well behind class leading 13”ers like the old Zenbook UX31E.
As I go through more Ultrabooks, I’m finding that the larger 14” and 15” models are not nearly as power efficient as the 13” Ultrabooks, so you find many more data points in the 4.5-6 hour range than in the 7-9 hour range that most of the 13”ers fall in. It makes sense, given the larger and more power-hungry display panels (which easily account for 30-40% of power consumption in our web-browsing test), but unfortunately, manufacturers aren’t putting in larger batteries to compensate. The U845’s battery is a meager 4Wh larger than the 13” Zenbook and Zenbook Prime. Also not helping here? The list of Toshiba services that drain even more power should you not disable or uninstall them first (I uninstalled Norton and ran the battery test with all unnecessary and easily killable processes disabled).