Your iPhone should be lasting longer
Here is a list i pulled together a while back. I suggest you activate as many of these factors as possible. I have noticed extreme change in battery life.
**IMPORTANT**
*before doing any of the following be sure to first back-up, transfer purchases, and sync your I-device with iTunes on your computer*
When wifi is not in use, switch airplane Mode to "on" (settings)
Full restore of iPod (iTunes)
Reset "network settings" (settings<general<reset)
Hold sleep/wake button until red slider comes on top of the screen slide it to power off.
Lowering brightness recommended 25% (settings<brightness)
Switch on "auto-brightness" (settings<brightness)
Full charge cycle at least once/month
Download all updates for apps (AppStore)
Download all iOS updates (iTunes)
Shut down any/all apps in your multiple-tasking bar before putting into sleep mode (hit the bottom middle button twice fast then hold your finger on an application for 2 seconds, then hit the little red minus sign on all)
Shut off "location services" (settings<general)
Charge device without a case on
Shut off data push (mail<contacts<calendar<fetch new data)
Fetch email less often (mail<contacts<calendar<fetch new data)
Make sure "auto-lock" is set to
No more than 2 minutes (settings<general<auto-lock)
Completely deplete battery at least once per month
Avoid use of sophisticated backgrounds or ultra bright wallpapers
Shut off "notifications" **NOTE** if you have specific apps that you need alerts from, you can manually select them individually (settings<notifications)
Do not leave iPod in extreme heat. If iPod is experiencing heat for whatever reason, take it out of that environment, and let it take a "cool-down" session
**IMPORTANT**
It is ok to let a few of these settings stay on. Just not a lot of them. If you follow these changes, your battery guaranteed will have hours of extra life added on.