Share your experience!
why My battery estimate usage is only 13 hours? And with stamina show me only 1day and 3hrs.
In 4.1 when battery was fully charged estimate usage was almost 3days and almost 5days with stamina.... Also now battery drains verticale fast.
.
To reset stamina mode,disable it,then go to settings-apps-all-eco mode controller,force stop and clear data.Restart your phone.
I can see your are from Romania.Salut from me!
For finding eco mode control switch your phone language to UK or you will find it with another name like extended standby mode controler
Salut! Thanks! Problem solved.
Great.
Hi
I think I might have the same problem - but where do you find the All ECO controler - should it be under Power management too?
AHH.. I need to read it all - find it under Apps 
But still...:
Also my phone often gets warm and recently it takes hours to recharge the battery - even when not used during charging - any suggestions??

Settings-apps-all-eco mode controller(set the phone to english language).You could try to disable functions like wifi,bluetooth etc when not using,also restart the phone regularly.