If you need to exit the power-saving mode, you can enter Settings-Battery-select "Balance Mode/Normal Mode";
If you need to exit the super power saving mode, you can click the → icon in the upper right corner of the desktop or exit-OK.
If you have more questions, you can go to official website /vivo Mall APP-My-Online Customer Service or vivo official website Web Edition-Slide to the End-Online Customer Service-Enter the manual customer service for consultation and understanding.