I lost 40 percent of battery after i played that robo tower defense game for about an hour. i had no gps, no bluetooth, no wi-fi, and i had shut down most processes with advance task killer. i did have screebl and a battery veiw app on though but that is literally it. is that normal? i hadn't used my phone pretty much all day. I did make two phone calls but they were each under 30 minutes and those were all done before i played the games. is that normal?