got the evo the day it came out. worked fine. battery was fine. then it started to just drain very quickly. one night it went from being fully charged to dead in the morning, while i was sleeping. so i wasn't using the phone at all. i have done a lot of the recommendations regarding how to not have too much synching etc which can drain the battery. no luck. so i got a new battery. still having the same problem. a buddy has the same phone, his has gps running, email synching, basic stuff like mine going, and he has 90% battery after 8 hours since taking it off the charger. i have 40% after 4 hours. anything i can do before i assume it's the phone and attempt to exchange? there are none in stock so i haven't been able to. any advice is appreciated.