I got my Xperia U on 28th February this year. I noticed straight away that I needed to charge it every day. I thought I would just have to get used to it. Now, it's getting ridiculous. I've turned every battery-eating app off, including wi-fi and gps etc. Now it's doing this mad thing where I switch it off at night with 40% battery power and it just flashes the red light in the morning when I try to switch it on! It only comes on when I stick it on the charger. Is there anything I can do? Or do I have to go back to the shop with it?