For background on how these settings could relate to the performance of the Zenit app, Battery Optimization.

Sony has its own unique feature on some devices that it calls Stamina ModeStamina mode instantly breaks all background processes and all alarms if enabled.

To disable Stamina Mode for Zenit, follow these steps:

  • Settings > Battery > Stamina Mode > tap on Never.

In addition, there are some settings you can adjust to ensure Zenit isn’t affected by aggressive optimization:

  • Settings > Battery > 3-dots menu in the top right corner > Battery optimization > Apps > Zenit and make sure it’s not being optimized to save battery.