I'm wondering about the battery on my Surface 3. On Tuesday I had my surface charging for almost 6 hours, during which I was using Windows Media Player. I didn't check the battery status but then I shut my surface (I didn't turn it off or exit WMP but the video had stopped playing. Usually it enters standby mode when I close it and don't use it for a few hours). Wednesday morning it was flat. I thought that maybe it was a one off. Today, I have had it on charge for about 4 hours (starting at 30%, while watching something on WMP and all of a sudden my tablet had a flat battery. Does anyone else have an issue with Windows Media Player being a battery drain or do you know of anyother reason why it could be dying so quickly?