I have only had my pro a couple of days. Ordered on the 9th and received it on the 11th. I was amazed how fast I got it and originally was to get this coming the Tuesday.
Today I played music at work from 9:30 am to 6 pm and at the end of my day was battery was at 52% before putting on the charger. 10:00 pm I am impressed with the battery especially playing music all day. My 14 pro would be at 37% or lower on the same time frame. So I am impressed with the 15 pro battery so far. Also the quickness.