Power Saving mode: When the battery level is higher than 10%, certain functions will be disabled, background apps will be restricted, and visual effects will be weakened to reduce power consumption. When the battery level is lower than or equal to 10%, stricter power saving measures are taken to ensure the longest standby time. It is recommended that you enable this mode when the battery level is lower than or equal to 20%.

To do so, go to Settings > Battery (or Optimizer > ) and enable Power Saving mode. A icon will then be displayed in the status bar.