LG Optimus L9 Instruction Manual page 13

1. From any Home screen, tap the Menu key.
2. Tap System settings.
3. Tap Power saver.
4. To turn on, tap the Power saver Switch to On.
5. To turn off, tap the Power saver Switch to Off.
Battery saving mode settings
To change settings for the battery life saving feature, follow these steps:
1. From any Home screen, tap the Menu key.
2. Tap System settings.
3. Tap Power saver.
4. Tap Turn Power saver on and then tap a percentage of battery power used for when power saving turns
on.
5. Tap to the following power saving settings to select the check box and enable or clear the check box and
disable:
Auto-sync
o
Wi-Fi
o
Bluetooth
o
Vibrate on touch
o
Brightness
o
Screen timeout
o
Front key light
o
Saving battery life
To save and extend battery life, follow these steps:
Lower screen brightness and timeout duration
1. From any Home screen, tap the Menu key.
2. Tap System settings.
3. Tap Display.
4. Tap Brightness.
5. Touch and slide the slider left to the lowest desirable setting.
6. Tap OK.
7. Tap Screen timeout.
8. Tap the lowest desired setting (lowest is 15 seconds) for when the screen will sleep.
Turn off Wi-Fi, Bluetooth, GPS, Portable Wi-Fi Hotspot
1. From any Home screen, tap the Menu key.
2. Tap System settings.
3. Tap More.
4. Tap USB tethering & Mobile HotSpot.
5. Tap Mobile HotSpot to clear the Check box.
6. Touch the Status bar and drag it down.
7. Tap Wi-Fi to clear the icon of color.
8. Tap Bluetooth to clear the icon of color.
9. Tap GPS to clear the icon of color.
Change application sync settings
1. From any Home screen, tap the Menu key.
2. Tap System settings.
3. Tap Accounts & sync.
4. To turn off all applications from syncing, tap Auto-sync data to clear the Check box.
5. To adjust sync settings for individual applications, tap the desired application.