The Sony Vaio Duo 13 is a Windows 8 hybrid that measures 13 x .8 x 8.2 inches and weighs about 2 pounds and 14 ounces. The model offers a larger screen and a smaller hinge, and it's outfitted with a fourth-generation Intel Core i5 processor. It's got a better keyboard, a SIM card slot for 3G usage. The biggest improvement has to do with battery life; it managed over eight hours on our battery rundown test. The Duo 13 uses Sony's Surf Slider design to make the transition from a tablet to a laptop. It still uses a spring-loaded hinge mechanism to move the tablet into a semi-upright position. The screen is held in place by two metal studs on the keyboard deck that fit into two notches on the bottom of the tablet. The 13.3-inch screen is housed in a silver carbon fiber chassis. It weighs in at 2.9 pounds, and when in tablet mode it measures a relatively thin 0.77 inches thick and is 13 inches wide by 8.3 inches deep.
