1. Find "Power saving"
Slide two fingers downwards starting from the top of the screen.
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Press the settings icon.
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Press Battery and device care.
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Press Battery.
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Press Power saving.
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2. Extend the battery life
Press the indicators next to the required settings.
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Press the indicator below "Power saving" to turn on the function.
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3. Return to the home screen
Press the Home key to return to the home screen.
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