I go to "Settings" and then "Applications". Once in "Applications", I go to "Running Services" and turn off certain applications I am not using. How long are these applications supposed to stay off: Until I turn my phone back on again? Until I turn my display back on? I hope I am making sense. I am trying to improve my battery life. I have turned off the background data and uninstalled the app killer. My display goes off after 30 seconds and I already have the brightness as low as it goes (I do this on every phone, I see no need to have a crazy bright screen).