Just picked up an an 'ultimate' 13" i7 2011 MB Air, and proceeded to run a stress test/battery run-down. Stress/Battery Test: Settings: I set brightness at ~65%, keyboard backlight at 50%, WiFi on, Bluetooth on, speakers off. Aside from Chrome, nothing extra was installed beyond what comes with Lion. In one Chrome window I ran a looping 720p Youtube video. In a second, I ran Pandora, playing through a radio station. iTunes was open on a second desktop, as was mail, albeit minimized. Finally, a single Safari window was open and running a timer. Perhaps not surprisingly, the fans kicked in at full gear through almost the entire test. Results: Under these conditions, from a full, fresh charge, the system managed 2 hours 24 minutes. So, MacRumors community, does this seem about par for what we should expect for relatively heavy (Flash) use, or does this seem a bit low? I know running Flash won't get anywhere close to the 7 hour mark Apple reports, but less than 2:30 seems a bit low... I'll update the thread with a more standard test to see if my Air's battery is on the short side. It should also be noted that before I started the test, the battery life indicator was only reporting 4 hours life, which is a bit odd.