Huawei Phones Turning Battery Optimization Off
Here are some list of other Huawei Phone with different EMUI version. And options on how to set changes on their battery optimization.
EMUI 3 and 4
Go to SETTINGS
All >>> Device >>> Power saving >>> Protected apps >>> Safe Lagoon and choose Power-intensive.
EMUI 5
BATTERY OPTION SETTINGS
Tap the SETTINGS icon (top right of the screen) "Power-intensive prompt" and "Close excessively power-intensive apps" settings must be disabled
EMUI 8
SETTINGS
Make sure that Power Saving Mode and Ultra Power Saving mode is OFF
Enable Auto-Launch, Secondary Launch and Run in Background
OTHER HUAWEI DEVICE
SETTINGS
Smart assistance >>> Notification Panel and unchecked the Notification settings.
Options will depend on the Model and EMUI, you can always use the search option on your phone to look for keywords so you can change the battery settings of the device.