1. Open the phone Settings and select the power saving and battery options
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2. Then select the upper battery
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3. Then select the Smart Charge protection below
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4. Turn on the smart charging protection.
Open your phone's Settings.
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2. On the Settings page, tap Battery.
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3. Tap More Battery Settings.
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4. Find smart charging modes.
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5. Turn on the switch so that the phone will stop charging if it is only charged 80%.
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Such as mobile phone, how to set the charge to 80% power off, this is not possible. To set, you can look at it according to yourself, charge to 80%, you can unplug the electricity.