Since I updated my iPhone 5s to 7.1 the battery has been really crappy, so I decided to do a clean install and restore from iCloud. The battery seems to drain as fast as it used to, but what surprised me was that I suddenly have almost 4 GB extra free space. I have the exact same apps, photos etc. as before, so I cant make any sense of it. Is this a common experience or is it just me?