i'm on 11.2 beta 1 now, and battery life has been amazing. well maybe amazing because i'm used to shitty battery life for so long now. i had to charge my battery twice daily (sometimes three), but now i charge overnight and at the end of the day i have 10% or so left.Let me know if you pull the trigger on this. I'm looking to do the same since my battery life is still bad.
really tho it's not really a consistent thing with this updates. it makes no sense but on the same phone and the same version of ios some people get good battery life and some people's batteries drain super fast.