To be honest with you, I can’t tell. I updated to 11.3 when it came out on Wednesday? then did battery replacement on Friday. It was back to back. I remember clearly my 6s+ being slightly smoother with the old battery and was thinking about canceling the genius appointment. The only difference I noticed after replacement is that battery last a bit longer on standby.Did you notice any difference in performance after the battery change?
I was expecting more drastic improvement on speed and battery life