I'll tell you exactly why the iPhone battery run out so quickly and exactly how to fix it. I will explain how you can get the battery life of your iPhone without sacrificing functionality! I do not think anyone should have to turn off all the features that makes the iPhone so nice to use.
There are many ways to preserve iPhone battery life, but most of them involve turning off some services and features, which makes it a hard choice.

Why does my iPhone battery life die so quickly ? Here are 15 tips to helps to extend your iPhone battery life, including new tips for iOS 7.

• Turn on Auto-Brightness

Find it in the Settings app -> Brightness & Wallpaper -> Auto-Brightness off

• Reduce Screen Brightness

Find it in Settings -> Brightness & Wallpaper

• Stop Motion (iOS 7)

Settings -> General -> Accessibility -> Reduce Motion -> move slider to green/on

• Disable 3D / parallax (iOS 7)

Navigate to the iOS 7 Settings -> General -> Accessibility -> Reduce Motion -> ON.

• Turn Bluetooth Off

Find it in Settings -> Bluetooth -> Move Slider to Off

• Turn Off 3G/4G

Navigate to Settings -> General -> Cellular -> Slide Enable 3G to Off on some models or Enable LTE to Off on the iPhone 5 or newer

• Keep Wi-Fi Off

Find it in Settings -> WiFi -> Slide to Off

• Turn Off Location Services

This feature sends data over a network all the time; it uses more battery power to work. If you’re not using Location Services feature, turn off it and save some power.
Find it in Settings -> Privacy -> Location Services -> Slide to Off

• Turn Off Other Location Settings (iOS 5 and up)

Go to Settings -> General -> Background App Refresh -> Either disable the feature entirely or for specific apps

• Prevent Background App Refresh (iOS 7)

It’s an excellent way to extend battery life.

• Don't use Automatically Update Apps (iOS 7)

prefer controlling our updates and may not care for automatic app updates.
Settings -> iTunes & App Store -> Updates -> move slider to off/white

• Turn Data Push Off

if you use push email, the handset will be receiving email frequently and eating up your battery.
Navigate to the Settings menu -> Mail, Contacts, Calendar -> Fetch New Data -> Slide to Off

• Turn off Equalizer

Find it in Settings -> Music -> EQ -> Tap off

• Diagnostics And Usage

Settings > General > About > Diagnostics & Usage > tap on the option that says Don’t Send

• Don’t Restore From An iTunes Backup – Use iCloud Instead!

Use iCloud Backup! and restore from iCloud Backup

• Lock Your iPhone

Go to Settings > General > Auto-Lock and set the interval to a shorter time, such as 1 Minute.

Extend Battery Life if Storing Your iPhone