From the Engadget review of the iPhone 4: "In fact, we managed to squeeze more than 38 hours -- yes, 38 hours -- of life out of a single charge using the phone as we normally would. We're talking calls, some gaming, lots of push email and calendar invites, playing music over Bluetooth in the car, and just general testing (like downloading new apps, rearranging icons, tweaking settings). We went from 10:30AM on a Saturday morning till 1:00AM on Monday without needing to charge the phone" I am NOWHERE near this ! I have about 4 hours of usage and 11 hours of standby and i'm at 45% right now. How did engadget get this much life out of their iPhone 4? I don't get it.