When I first installed Graphene battery performance was great from 5 to 7 hours Screen on time and I even got 9 hours+.
Now it's usually 3 to 4 hours, except 5 at best. I checked apps consuming but nothing seems off, I even remove background usage from most of my apps, the only thing I noticed on battery usage was "view by system" Mobile network took 40% to 80% screen took 11% I don't think this is normal. I don't even use 5G, I use LTE to get a better battery.