Apple claims that on the 4G Touch you can get "up to 7 hours" of video playback when fully charged. Do you guys see anything close to 7 hours? The reason I ask is because I am maybe getting 3 or 4 hours (all default setting, except the WiFi is off) and nothing runs on the background, only playing Angry Birds. It runs for maybe 4 hours tops (if that), then I get a warning that the battery is at 20%, but if I continue playing it shuts down in about 20 minutes, so I am not even sure if the 20% warning is correct. What am I missing? Should I disable something in the settings to get more time out of the battery, or...? Thanks.