my 4g radio has been scanning for four days straight as i have been driving cross-country with gps on and navigation pulled up with my screen set to never turn off. All the while, my phone has been downloading full-length hd movies, and i have been chatting with friends on gchat almost incessantly. I also have all accounts, including twitter, facebook, weather, and google, set to update every ten minutes.
I brought a car charger with me on my trip, but i haven't had to use it yet. My battery is at 92%. The first 5% went in the first ten minutes, but the next 3% has lasted three day, 23 hours, and 50 minutes.
I have to admit, though, that i'm not typing this message on my phone. Instead, i'm using the wireless tether, and i've managed to connect 14 other wifi devices, including the laptop i'm currently typing on.
I don't see what all the complaints are about.