I've completely moved back to official latest 4.3 from SONY (from CM). I'm getting quite good battery time if I'm not touching phone
Anyways, I have Stamina enabled. Now, I understand this correctly, WIFI and DATA should get disabled when phone is sleeping. Is the picture posted what it should be when Stamina kicks in? because, I don't see wifi getting disabled nor DATA.
I've tried clearing data for its service but other than that... It looks like data and wifi stays on all the time. Also, under device administrators, ADM (android device manager) is enabled, nothing else, my Xperia is disabled.
If you tell me the battery works as should, i'll stop nagging, but I'm not sure 100% that Stamina works.