I have tried all battery optimisation tips and apps. Nothing helped.
Last week i tried Greenify. Made some settings. It was the first time it had 36 hours standby time with medium usage.
Then i have installed newer official rom (I9190XXUBNA1), made all greenify settings and bought new original samsung battery (1900 mAh).
But standby time was (with no usage) 18 - 20 hours. I tried old battery again, it was 16 - 18 hours.
I tried 2 more original samsung battery (19000 mAh). Unfortunately same bad result
I formatted everything again and again. Reinstalled rom. Wipe data cache, wipe dalvic cache, format system - data etc..
recovery-clockwork-188.8.131.52, recovery-clockwork-184.108.40.206-serrano3gxx.tar, philz_touch_6.12.8-serrano3gxx.tar
Odin3 v3.04, Odin3 v3.07, Odin3 v3.09
I formatted external sd card. I removed it...
I do not think that it is a hardware problem. Because - 1 week ago - old dead battery had 36 hours standby time with medium use..
Thanks in advanced