Hi,I put my mobile to charger since it was just 13% of battery left. When I came 2 hours after to check how is it going I was kinda shocked. Notification center showed 15%. Thats 1% per hour ! So I got an idea. I turned off the phone and waited to boot itself to charging screen. When it does, the notification led turned from orange to green and the screen showed image which represents charged battery.So I turned my phone on again and voila the battery was 99% (the notification led turned orange again, I dont know why).Maybe this will help somebody who have similiar problem.