I thought I would share my real word battery life calcs for my new Aria. This is an AT&T model, so it's a "locked" phone. I get poor reception in my basement office at work, so the WiFi is constantly searching for a signal. At home, where it can jump on my local network, it actually does a bit better in battery life. Other than that: (Standard config, screen timeout 1 minute, no extra apps running): Full on - 3G, WiFi: 19% of battery charge per hour. Roughly 5 hours available. WiFi shut down, but 3G on: 6% battery charge per hour, about 16 hours time avail. Full Airplane Mode: 1-2% per hour, days of standby time! This is assuming you aren't playing games, or checking the weather, etc. Just standby time in the listed configurations. Your actual use may vary..