Stamina battery mode was removed from Sony Xperia devices with Android 6.0 Marshmallow upgrade and it is replaced by new “Doze” feature of Android. However many users become unhappy of this change as the new function was not as efficient as Stamina mode for many.
Yesterday Sony replied to my tweet about this issue with good news. Stamina battery mode will be re-launched in 2016.
Sony’s response:

Users who miss those functions have to just wait in patience.
Meanwhile I will personally keep “Doze” mode always on.
Iโm a US-based software engineer with a background in law. I share mostly practical tech notes here for my future self and anyone who finds them useful.
One of the things Iโve built is Masterlist: Focus & Tasks, a privacy-focused, local-storage-only task manager that offers focus tracking tied to tasks and projects, compatible with the Pomodoro technique.
