1. Avoid letting the device run out of power before charging; this will shorten the battery's lifespan.
   
2. Turn off any services that aren't currently in use, such as Bluetooth or Wi-Fi.
   
3. Set the device to automatically adjust brightness.
   
4. Avoid using live wallpapers.
   
5. To access power saver mode, from the home screen, swipe down from the Notifications bar with two fingers.
   
6. If disabled, tap Smart saving to enable.
   
7. Tap the Settings icon.
   
8. Scroll to, then tap Power management.
   
9. Tap Power Saver.
   
10. Tap the desired power saving mode.
    
11. To enable and disable specific power saving features, tap Customized mode.
    
12. Tap the Settings icon.
    
13. Adjust the settings as desired.
    
14. To view how the battery is being used, from the home screen, tap Apps.
    
15. Swipe to, then tap Usage Manager.
    
16. Battery usage can be viewed here.