Originally Posted by Nicolae-Daniel
Since stamina mode means underclocked cpu and reduced brightness you can do this with a custom kernel.
Sent from my GT-I9300 using xda app-developers app
Actually Stamine Mod means scheduling apps and services to specific times. For example, you may let GMail work and sync only between 08:00-18:00 in weekdays. Or your software updates can be checked only once in every two days etc..
It is like an extended Greenify without needing root.