The Lenovo IdeaPad U310. A Stylish Yet Inexpensive Notebook That Can Update Emails While In Sleep Mode and Last 6 Hours on a Single Charge. The stylish yet inexpensive IdeaPad U310 ultra notebook uniquely combines a super-slim design with ultra responsive technologies and long battery life to keep you productive anywhere. It's powered by the smart performance of a 3rd gen Intel Core processor and smart features like Lenovo Smart Update that downloads your emails even while on sleep mode. Plus, the U310 notebook has an extended battery life of up to 6hrs.