I've had the Surface 2 for over 3 weeks now, and have been relying on using this for writing my research papers and eventually when I'll do my thesis. There aren't much reports regarding the Surface 2's battery performance and I thought of sharing my personal experience. So far, my battery report has an average of just below 7 hours average from the many different ways I've used this thin device with a Type Cover. The longest on one charge was around 8.5 hours. Take for example for today, when I started writing at about 8:30am with 97%, using Word and flipping through DrawBoard for PDF reading on half the screen. I turned off the wireless connectivity 90% of the time, except when I needed to transfer images. I reached 5% with 15 minutes shy of 8 hours on battery. My screen was set at 50%, had my Type Cover's backlight off, and a mouse attached. You can see my battery stats above. Microsoft stated 10 hours of total usage time for the Surface 2 for media playback. But considering that the Surface Pro 2 can normally operate around 5 to 6 hours, and reviews say the Pro 3 can go about a realistic 6.5 hours on a full charge. Although more than 8 hours of continuous or accumulated productive usage per charge is good enough, I want to get the Power Cover even with the added thickness for probably getting more than 13 hours. Has anyone done this with their Surface 2? I want to be able to just leave the power plug at home, and get to use the Surface 2 all day without worrying about power.