How to Increase the Battery Life of a Windows Phone 8 Device

You can actually improve the battery life of your windows phone by adjusting some of the built-in settings that are mentioned below.
STEPS
_ 1GO TO SETTINGS. Swipe to left on the home screen, then go to the letter S_ in the alphabets.
_ 2UNDER SYSTEM SETTINGS, GO TO EMAIL+ACCOUNTS, AND FOR EACH OF YOUR ACCOUNTS, INCREASE THE PERIOD OF DOWNLOADING NEW CONTENT TO AS MUCH AS YOUR PREFER.

3

GO TO LOCK SCREEN; decrease the screen time out.

4

TURN OFF WIFI, BLUETOOTH, NFC_ (IF AVAILABLE, FOUND UNDER TAP+SEND)_, internet sharing, location_ and _data connection_ (found under MOBILE NETWORK) if they are not in use.
_ 5DECREASE THE SCREEN BRIGHTNESS TO LOW_ AFTER DISABLING THE _AUTO BRIGHTNESS_ OPTION UNDER THE BRIGHTNESS settings.
_ 6GO TO PHONE UPDATE and disable the automatically download updates._.. option.
_ 7DISABLE BACKUP OPTIONS IN THE BACKUP settings. When you wish to backup your app list, settings, pictures,... etc, you should enable backup and tap on back up now_.
_ 8TURN ON THE BATTERY SAVER; FOUND IN BATTERY SAVER.

9

DISABLE THE VIBRATE_ OPTION UNDER RINGTONES+SOUND.

10

FROM THE APPLICATIONS SETTINGS:
Block the unnecessary apps from running in the background from BACKGROUND TASKS._
Disable Sync game requests_ option in the GAMES settings.

11

FOR NOKIA LUMIA PHONES:
For the models that support super sensitive screens: disable the super sensitivity option that is found under TOUCH.
For the models that support double tap to wake feature: disable it. You can find it also under TOUCH settings.
For the models that support glance: disable it from the GLANCE settings.


TIPS
Turn off the options if you are not using them.
While you can disable the GLANCE, TOUCH SENSITIVITY and DOUBLE TAP TO WAKE options in some of the Nokia devices, the battery will not improve by a big margin as they don't drain it as much as some other settings shown in the article, as the background tasks, for example.