Maybe I discovered a problem with battery indicator.
Charged to 100%, standby for 2hours 30mins and it showed 77% - at this point batery current was -351. Shut down, turn on - now it shows 90%.
There is something might be wrong with battery indicator.
Maybe this is why some people talk about bad battery drain. For them i recommend to try shut down and turn on again. (I also took the battery out for a few seconds)