Huawei P20
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Extending the battery life
Some functions on your phone use a lot of power and therefore significantly reduce the battery life. You can reduce the power consumption by turning on low power mode.
Step 1 of 4
Press Settings.
Step 2 of 4
Press Battery.
Step 3 of 4
Press the indicator next to the required setting.
Step 4 of 4
Press the Home key to return to the home screen.