Well, Powerskin has something it hopes will put a plaster over that problem, with the Mili Power Skin, 'Made for iPhone' case.
Not just a super-slim protective case for your iPhone, it also has an integrated battery – the very same battery as Apple's iPhone indeed.
This will give your beloved mobile an extra 19 hours audio play time, over 5 hours of video playback and up to 230 hours of standby time.
Available in eight different colours, the Mili Powerskin is on sale now from £50.