I was mainly referring to this site: http://www.mobiletechreview.com/notebooks/Sony-Vaio-Duo-13.htm But also I think they even talked about it in the review here at tabletpcreview or laptoppcreview. Of course, these reviews were published a year ago, or longer, when the device debuted, and they had brand new units. I'm not an expert on battery life by any means, but it does seem to me as though your device's history as a display unit could, unfortunately, be causing the problem. I just did a little more research on Win8.1 and my fears are slightly assuaged after reading this thread: http://community.sony.com/t5/VAIO-Hardware-Networking/Duo-13-After-Windows-8-1-Upgrade/td-p/206835 It looks like if you follow the right procedure - i.e. mess around with the driver upgrades, doing them one-by-one or something - you can avoid a lot of insanely weird issues people were having. We're talking stuff like the auto-rotate not working, blurred text, wi-fi not working... it was crazy across the board, but it couldn't persist. If it did, the product would be labelled as utterly dysfunctional.