Display using 90% of battery, phone dies in 3 hours

[tube517]

In which app?

Android Booster

 

[daniellep522]

Mine does the same thing. If I turn on GPS, I'm lucky if I get 5 maybe 10 minutes before the entire phone shuts off, and that's when its 50% or more charged! I kill tasks, never run 4G, limit my apps, etc etc. Since the day I purchased my phone I have had this problem (grr Evo 4G)!
It's soo annoying when I'm trying to get things done for work on the road or at airports and I have to constantly be plugged into an outlet! Has anyone done the factory reset and found that that helps? Im worried I'll lose important things on my phone even though I have it backed up because it seems as though everytime someone does a factory reset (on any phone) it screws things up!
So frustrating!