Bootcase Hybrid Power
Apple iPhones are notorious for having poor batteries. So there is a healthy market in power backup cases for those who want to use their devices intensively for work every day.
This Boostcase is a stylish, if slightly over-pricey, way of doing it. It comes in two parts: a regular protective case and the extra power segment (which gives over a full charge to your phone). It's very nicely finished and looks great compared to some of the clunky black plastic cases it's competing against. On the other hand, €100?