[dangrossman]

I don't know what he's doing to get that kind of battery life. I've had my SP for a few months now, and it consistently gets 5-6 hours of actual usage, even heavy things like streaming HBO. It's not 12+, but there's a Core i5 behind the glass, and my Core i5 laptop doesn't get half that running time.

[BrentOzar]

Brent the author here. I'm doing basic productivity work while listening to music, doing email, and leaving Twitter & Hipchat open. Engadget and The Verge both noted sub-4-hour battery life in their reviews too. I'm glad you're getting more life though.