Actually no - but probably I've found solution - I disabled "notifications about updates and recommendations" and usage reporting. So far result is quite ok, but I will observe battery for a few days more.

Hello,
I love Opera for Android and I'm using it for a long, long time. I really appreciate convenient news feed, easy tabs management and ad blocker. Unfortunately, I'm experiencing some problems with high battery drain when Opera is running in background since about 1 month. As you can see on >>image here<< battery drain stops after force-closing Opera app.
I have non rooted Sony Xperia M4 Aqua E2303 with Android 6.0.1. I can deal with this problem by rooting phone and use greenify app, but it's not the way I want.
Is it possible to do something with this high battery usage? Maybe more information and logs are required? I can provide all what you need.
Thank you in advance for help.
nortonex