Try This out Friend:-

1. Turn Off Push:
Change your email FECTH time so it’s less frequent or turn it off completely by tuning off “PUSH” and check your emails manually, This can save around 20% battery life.

2. Turn off 3G if not in use:
If you don’t see a 3G icon on your iPhone status bar, then you’re not in a 3G hot spot., and you’re not getting any benefit from the phone’s 3G radio. By turning it off, you’ll double the length of your iPhone battery power from 5 hours of talk time to 10.

3. Turn off EQ:
Applying EQ settings to your iPhone apparently drains extra battery. If you’re planning on keeping your phone alive all day, turn the EQ settings off.

4. Set Auto-Lock to 1 Minute:
When you’re not using you phone, lock it. And just in case, put you iPhone to the shortest possible auto-lock setting so that it locks automatically (and quickly) when you aren’t active.

5. Turn down screen brightness:
When you’re in battery life saver mode, turn the brightness all the way down, it doesn’t take a genius to understand that more brightness = more power consumed.

6. Minimize use of location services:
Since this requires the use of GPS, using location services sucks more energy from you battery. Use it only when really necessary (that means don’t go on MAPS just because you’re bored).

7. Turn Off Vibrate in Games:
A lot of games have very frequent vibrations, which drain battery life. If you can, turn them off in the game’s settings.

8. Stay updated with the latest firmware:
Apple’s minor firmware update frequently introduce some new methods of functionality which are better on battery life.