Using for a week, I think similar battery performance. Just have an issue, after playing temple run 2 for 10 minutes phone gets hot not very much but game starts to drop fps. Why I dont know. Overall performance is great.
I found a link here: https://www.teamandroid.com/2018/06...s-v3-1-1-on-xperia-z5-nougat-custom-firmware/
Which is https://mega.nz/#!JNYnDZgC!VJITjtq3vWesKrIK2XXRHyLJKbe0XbxPRYLEAdmsyaY
I'm downloading it currently. No idea if it works yet