Hello guys, I have iphone 4S 8gb working on IOS 7.1.2 . I have been using it for 1 year already. When i'm surfing the internet using the phone, 1-2% of battery life is lost per 2 minutes. If i'm playing some games or run some applications, then about 1% is drained a minute. For example, The battery life was on 22% when i started playing Angry Birds Space, but after 19 minutes of playing the battery life was only on 7%. So 15% was drained in 19 minutes! I'm interested if this is usual for iphone 4S on IOS 7.1.2 or the battery of my phone has problems. Please tell me how your batteries work and how many percentages you lose per minute. I appreciate your help, thanks in advance 