Hey I just got an iPhone 4 a month ago and I am very new to this Apple world, never owned an iPhone but now even though I had previously owned an iPod Touch. Anyways, I feel like the battery is draining really quick even though most of the apps are use require internet, like Twitter, Facebook, and others. I have Wi-fi off all the time, as well as the location services and the mail to push manually instead of automatically. The brighteness is somewhat to the minimum and I just try not to use the phone a lot. Anyways here's a photo of the usage.