Is anyone still experiencing poor (very poor) battery life after updating to iOS 11?

I could leave My phone untouched all day long at work and perhaps even send a few texts but not really use it and it would have about 92% charge at the end of an 8 hour work day. I loaded iOS 11 on it and powered it off completely and In 2 hours lost 30% of my battery power. It was OFF completely.

How is this fixed????

Completely unacceptable