Open your phone's desktop and tap Settings.
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2. On the pop-up screen, tap Battery.
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3. On the displayed screen, slide the power saving mode switch to the right.
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4. The button turns blue after opening.
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5, then a dialog box will pop up, asking whether to turn on the power saving mode, select OK.
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6. Finally, slide the super power saving switch to the right, so that we turn on the fast charging