My iPhones been running for 2 Days and 8 Hours and it hasn't hit 20% yet. I've used it on wifi for 80% of the time. No fetch or push on, screen brightness pretty low, bluetooth off and location services off? I know 3.5 Hours is not an ideal usage amount for most of you, but the standby is great right now for mine! Unfortunately i don't think i can run it till its dead, cause i may need to charge it up.