Android Oreo Abnormal power consumption

[q310550690]

Hello everyone. 
I updated the Android Oreo after the battery was significantly reduced .
In the Android 7.1.1 can be bright 7H screen .
But after the upgrade to android 8.0.0, bright screen time down to 4 ~ 5h .
It is terrible .
Will next month's security update address power issues?

[Yet1Bluesky]

True, also experience it.

Atm I have 67% battery with 1h15m SoT. -> ~3h45m SoT in total. In nougat I had about 6-7 hours. Battery drain is extrem in Oreo