Enabling and Customizing Battery Saving Mode:

  1. While viewing a home screen, press the "Menu" button
  2. Tap "System settings"
  3. Go to the "General" tab
  4. Scroll to "Device" and tap "Battery"
  5. Tap "Battery saver" > "Turn Battery saver on"
  6. To customize the level at which battery saving mode kicks in, select one of the following:
    • Immediately
    • 10% battery
    • 20% battery
    • 30% battery
    • 50% battery
  7. Mark or clear the check boxes associated with:
    • Auto-sync
    • Wi-Fi
    • Bluetooth
    • Vibrate on touch
    • Brightness
    • Screen timeout
    • Notification LED
  8. You can tap "Settings" and access more screen options, including "Brightness" and "Screen timeout"

Adjusting the Screen Brightness and Timeout Duration:

  1. Press the "Menu" button while on a home screen
  2. Tap "System settings" > "Display" > "Brightness"
  3. Drag the brightness slider to the left in order to decrease the brightness
  4. Tap "Screen timeout" and select a lower value, such as "15 seconds" or "30 seconds"

Disabling Wi-Fi, Portable Wi-Fi Hotspot, Bluetooth and GPS:

On a smartphone, the connectivity features are the most battery demanding, especially GPS. It's always advised to disable these options when they're not in use.

  1. From a home screen, press "Menu"
  2. Tap "System settings" > "Tethering & Networks"
  3. Tap "Mobile HotSpot" and clear the check box next to "Mobile HotSpot"
  4. Press the "Back" key twice to return to the "Settings" menu
  5. Under "Personal", tap "Location access"
  6. Clear the check box next to "GPS satellites"
  7. Return to the home screen and drag the "Status" bar down
  8. Tap the "Wi-Fi" and "Bluetooth" switches to turn these features off

Changing the Application Sync Settings:

  1. Press the "Menu" key from a home screen
  2. Tap "System settings"
  3. Under "Personal", tap "Accounts & sync"
  4. Clear the check box next to "Auto-sync data"
  5. To reduce sync intervals for specific apps, tap the desired application

Disabling Live Wallpapers:

Live wallpapers can impact your smartphone's battery life greatly, especially if they're CPU and GPU intensive. It's always a better choice to use pictures as wallpapers, if you wish to conserve battery life. To do this:

  1. Tap and hold an empty area on the home screen
  2. Tap the "Wallpapers" tab at the bottom
  3. Scroll to, and select the desired wallpaper
  4. Tap "Home" to return to the home screen

Disabling Background Data:

  1. From the home screen, press "Menu"
  2. Tap "System settings"
  3. Tap "Mobile data" and press the "Menu" button
  4. Mark the "Restrict background data" check box

Using Fewer Third Party Applications:

  1. Press "Menu" from the home screen
  2. Tap "System settings", scroll to "Device" and tap "Apps"
  3. Choose the application that you wish to edit
  4. Tap "Disable" to turn off the app. You can also tap "Uninstall" to completely remove the app. NOTE: only 3rd party apps can be uninstalled

Switching from 4G to 2G Connectivity:

  1. From the home screen, press "Menu" > "System settings"
  2. Tap "Networks"
  3. Scroll to "Tethering & Networks", and under "Network", tap "Mobile networks"
  4. Mark the check box next to "Use only 2G networks". NOTE: clear the check box to return to 4G

Updating to the Latest Firmware Available:

NOTE: this guide will increase battery life assuming that LG has released a new software update that includes battery life improvements. Otherwise, following these steps will not have an effect on your device's battery performance.

  1. Press "Menu" from the home screen
  2. Tap "System settings"
  3. Under "System" tap "About phone"
  4. Tap "Update Center" > "System updates" > "Check now"
  5. If there's a new update waiting for you, follow the on-screen prompts to download and install it

See More: LG G Flex: Tips & Tricks to Maximize Battery Life