at desk by 8:45 am. Left the SP2 open on the desk while taking notes until 6:45 pm. Screen saver came out several times, but I don't think it ever went to sleep. Then walked home and got another 30m out of it before it shut down at 5% left. If it seems too good to be true, some details: * was not on WiFi at the office, only at home. (certainly ran down faster there) * Bluetooth off * screen down low, probably 20% but still quite visible * not running Office until I got home, just OneNote for the most part Still, I was blown away at how long it lasted. Methinks I'll be slipping into airplane mode when I want the longest battery life (will keep me from getting distracted, too!).