Saving your iPhone's battery power

- Go to Settings and you'll be able to turn Wi-Fi off to conserve battery power when you don't need to connect to a Wi-Fi network.

- Under General in Settings, you can also set the Auto-Lock time to a lower amount so it will automatically lock and reduce battery usage after a period of time.

- You can also turn off notifications in Settings to further reduce battery usage.

- Push email also eats up battery and can be turned off from Mail, Contacts, Calendars under Fetch New Data.

- Optionally, you can also change how often your iPhone tries to push email.