With the battery optimization, you can switch certain app activities of the Huawei smartphone on or off in the background. This extends the battery life, which plays an important role nowadays.

Android 10 | EMUI 10.0
Step 1:  Open the  settings
Step 2:  Tap on  Apps
Step 3:  Tap on  Apps
Step 4:  Open the  menu
Step 5:  Tap on  Special access
Step 6:  Tap on  Battery optimization
Step 7:  Choose an  app
Step 8:  Choose a setting and tap on  OK
  1. Open the settings
  2. Tap on Apps
  3. Tap on Apps
  4. Open the menu
  5. Tap on Special access
  6. Tap on Battery optimization
  7. Choose an app
  8. Choose a setting and tap on OK

Huawei Instructions