1. To determine what apps and features are using the most battery power, from the home screen, swipe to, then tap AT&T.
   
2. Tap Usage Manager.
   
3. Scroll down to view a list of apps and processes that are using battery power.
   
4. To access power saver mode, from the home screen, swipe down from the Notifications bar with two fingers.
   
5. If disabled, tap Smart saving to enable.
   
6. Tap the Settings icon.
   
7. Scroll to, then tap Power management.
   
8. Tap Power Saver.
   
9. Tap the desired power saving mode.
   
10. To enable and disable specific power saving features, tap Customized mode.
    
11. Tap the Settings icon.
    
12. Adjust the settings as desired.
    
13. Turn on Auto-brightness to save battery life.
    
14. When not in use, turn off Bluetooth and Wi-Fi.
    
15. Avoid using Live wallpapers.
    
16. Turn off Location services when not in use.
    
17. Turn off auto-update apps.
    
18. Turn off mobile data to prevent background applications from consuming battery.