I unplugged my iphone from the charger at 9:00AM and when I checked there was 1 minute for usage. It has been left on standby all day since then until now when it is 1:30PM. It now says 20 mins for usage. I didn't receive any phone calls or texts during that time. I did receive a few e-mails. I have Location Services off, WiFi on (though it isn't connected), 3G on and push e-mail on. I have fetch e-mail set to manual. Is this normal that I could gain 19 mins of usage which I can only guess is being caused by push? Any help would be appreciated. Thanks.