Data Usage & Battery life savings if interested. Yes, you lose some of the stuff that you bought the phone for, but if not in use, than you can turn some things off to help the battery life, including anything that you might have just installed that uses it...
Do a Google search as well to find other battery saving tips....
Close apps like Tweetie > Weather > Maps > YouTube > Pandora > New York Times > Facebook > Viewing Photos > Sync > iCloud...Only on WiFi
Safari > disable ads > pop ups > Banners > Install “AdBlock” from iTunes store
Switch to 3G to save data consumption > Tap “Settings” > tap “General” > tap “Cellular” > tap the “Enable LTE” to set it “Off”
Usage in iOS settings > tap the Settings icon > tap General > tap Usage. Now see which ones you can delete.
Turn off Push email
Turn off Push notifications
Brightness down a bit
Turn off Widgets (Weather > Stocks)
Bluetooth off
Turn off raise to speak > Settings > General > SIRI
Double click Home Button to activate dock > hold finger on an app to enter the jiggly mode, and kill the app.
Turn off App Refresh/Location based iads/Popular Near Me/Time Zone/Traffic
Turn Off Twitter/FaceBook/Maps until one needs it/Compass/Local Advertising. Turning off the GPS tracking won’t do much, but disable tracking for a few of the most used apps could help with the battery
Turn Off AirDrop by swiping upwards from the bottom of the screen and two steps from here to disable airdrop.
You can disable this feature by toggling on the "Reduce Motion" option in the Accessibility menu.
The same goes for the new dynamic wallpapers. A moving background image is a pleasant bit of eye candy, but it serves no functional purpose other than shortening your time between charges. Kick these features to the curb, and your battery will thank you.