LG VS840 - Manual (Page 175)

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Settings
Erase SD card: Permanently erases everything on the microSD card and
prepares it for use with your phone. You must unmount the microSD
card before you can erase and format it.
Power saver
Drag the button on the Power saver switch to the right to turn it on.
Drag it to the left to turn it off. Tap Power saver to access the following
settings:
Turn Power saver on: Opens a dialog box to set the battery charge
percent level to automatically turn on Power saver.
Power saver Tips: Opens a screen with tips for using the Power saver
function.
POWER SAVING ITEMS
Select features to turn off or to change value when battery is low.
Auto-sync: Checkmark to turn off Auto-sync.
WI-FI: Checkmark to turn Wi-Fi off when data is not being used.
Bluetooth: Checkmark to turn Bluetooth off when not connected.
Vibrate on touch: Checkmark to turn off tap feedback.
Brightness: Checkmark to turn off the screen brightness you set in
Power saver. Tap the settings icon to change the setting.
Screen timeout: Checkmark to turn off the screen timeout you set in
Power saver. Tap the settings icon to change the setting.
Front key light: Checkmark to turn off the front key light settings in
Power saver. Tap the settings icon to change the settings.
BATTERY INFORMATION
The Battery charge information is displayed on a battery graphic along
with the percentage of the remaining charge and its status.
Battery percentage: Checkmark to display the battery level percentage
on the Status Bar next to the battery icon.
Battery use: Opens a page that displays which components and
applications are using the most battery power. Tap one of the entries to
see more detailed information.