iPhone 4 - Bad battery?

[bboeira]

I need you help, I think I have an iPhone with a bad battery guys

Location off
Notifications off
Brightness 50% with Auto-Brightness off
3G on
Wifi off
Bluetooth off
Push/Fetch off (manual)

The 2 hours and 27 minutes os usage have been made with e-mail, Twitter, Facebook, MSN messenger, two text message and no calls at all. Everything over 3G.

I know this is very relative and that 3G kills the battery life, but this seems really bad.

Should I take it back?

 

[pintsizemacman]

are u getting good reception if not its been searching for a tower the whole time.

 

[bboeira]

are u getting good reception if not its been searching for a tower the whole time.

Yes, I'm getting good - not great - reception. It has not looked for signal during that time =/