I think people have forum sickness when it comes to the battery. If you're getting about 4 hours "heavy usage" Display Up Time (DUT) the phone is fine. If you're getting 7 - 8 hours of moderate usage (local music not streaming) on the phone with less than 4 hours of DUT the phone is fine. If you're getting 1d 4h + of time since unplugged and you have Mobile Data shut down and are using the phone for calls and text only, the phone is fine. I have never tested pure streaming with the Display Off so I can't comment on the usage time. 4 diffrent EVO's and these results are pretty consistent. No Task killers no start up killers, heck leave BT on if you want it wont have noticeable impact on battery life. What will kill your battery is poorly managed Widgets and syncing schedules.