I went out today with a full charge. Tried to get noksnes running a game for a few minutes but its pretty flaky. Then I played Urquan Masters for a bit. Listened to a bit of music. After maybe a 40 minute train ride, battery was almost at 50%. This was around 3:45pm EST. The half charge kept me going with shooting off an email with 1mb attachment, one brief call, checking the phone periodically, a few min of web surfing, a few pictures (with flash). I think we'll see battery life improve as apps get more polished. EDIT: oh yeah, I started getting battery warnings walking home from the train a few minutes ago (11-11:30pm EST)