Setting method: Select Settings > Power Saving Management > Protected Background Applications in turn, uncheck the applications marked as "high power consumption tasks" and do not select other unnecessary background tasks. After setting, the screen will automatically stop this power-consuming application.

2. Clear background applications

Setting method: press and hold the third icon in the navigation bar in the lower right corner, and a brush will appear after release, where you can slide to clear some unnecessary background applications or click the brush to clear them.

3. Adjust the screen brightness

Setting method: Select Settings-Display-Brightness in turn, and adjust the value of the brightness reduction progress bar.

4. Restrict the application consumption process:

Setting mode: "mobile phone housekeeper"->; "traffic management"->; "Traffic Ranking" turns off "Mobile Data" and "WLAN" next to "All" and makes them in a gray state.