LG D415 - Manual (Page 9)

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Turn off automatic syncing for Gmail™, Calendar, Contacts, and other
applications.
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Some applications you have downloaded may cause your battery power to be
reduced.
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While using downloaded applications, check the battery charged level.
To view the battery charge level
1 From the Home screen, tap Apps > Settings > General tab > About
phone > Battery.
2 The battery status (charging or discharging) and level are displayed on the
top menu of the screen.
To monitor and control what uses the battery
1 From the Home screen, tap Apps > Settings > General tab > About
phone > Battery > Battery use.
2 The bottom of the screen displays battery usage time and also lists applications
or services using battery power from greatest amount to least.
3. Installing an Open Source Operating System
Installing an open source operating system on your phone and not using the
operating system provided by the manufacturer can cause your phone to
malfunction.
Warning!
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If you install and use an OS other than the one provided by the manufacturer, your
phone is no longer covered by the warranty.
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To protect your phone and personal data, download applications only from trusted
sources, such as Play Store. If some applications are not properly installed on your
phone, your phone may not work properly- or serious errors may occur. You will need
to uninstall those applications and all of its data and settings from the phone.