As posted before, after the update my battery had been appalling.
I sent the phone to the service centre who pushed it back to me last week saying no hardware or battery faults. This means its 100% to do with the God awful pie update that ha turned my handset from a McLaren F1 into a 1976 Lada instantly.
I noticed there was a small software update today which I installed I'm hoping this has solved the issue as you shouldn't have to have brightness at 50%, no UFC, no location, no background refresh just to make it through the day
Let's hope it's fixed otherwise I'm selling my Note9