1. To turn on the battery saving features of your device, from the home screen, swipe down from the top of the screen and tap the Settings icon.
   Note: This device's talk time is 20 hours and the standby time is 16 days.
   
2. Under the System section, tap Power saving.
   
3. Tap Power saving mode.
   
4. You can prolong battery life with modes that save power.  Tap the Power saving mode toggle to turn on Power saving mode.
   
5. To view which applications are using the most battery power, from the Settings page scroll to and tap Battery under the System section. Scroll down to view battery usage. 
   
6. To turn Auto-brightness on/off, from the Settings page, tap Display > Brightness > Auto-brightness check box, then tap OK. 
   
7. To set the screen timeout to a shorter duration, tap Settings icon > Sound and display section > Display > Screen timeout > select desired time.
   
8. To turn Location Services & GPS on or off, swipe down from the top of the screen and tap Location.
   
9. To turn off auto-update apps, tap Play Store > menu icon > Settings > Auto-update apps.
   
10. To turn off auto-sync, swipe down from the top of the screen and tap the Expand icon.
    
11. Then tap Sync.
    
12. If you are traveling and do not have access to mobile or Wi-Fi networks, switch to Airplane mode.
    Note: To turn airplane mode on or off, swipe down from the top of the screen, tap the expand icon, then tap Airplane mode.
    
13. If Airplane mode is on, the Airplane mode icon will appear in the notification bar.
    
14. Turn off Bluetooth, Wi-Fi, & NFC when not in use by swiping down from the top of the screen and tapping the Expand icon.
    
15. Tap Bluetooth, Wi-Fi, & NFC to turn on or off. 
    Note: For additional information about charging your battery, please search tutorials for 'Charge the battery'.
    
16. To turn live wallpaper off, from the Settings page, tap Wallpaper > tap desired wallpaper that is not a live wallpaper  > tap SET AS WALLPAPER.
    
17. The Talk time of the device is up to 29 hours, and the Standby time of the device is up to 20 days.