I’d say it is very good.
People often focus on screen time and forget that it’s the constant switching between base stations and signal connections that drains most of your battery when you're mobile and not connected to Wi-Fi.
I have been using the 16 Pro for a few days now, and I always get a sense of déjà vu when I take it out of my pocket after an hour or so to find the battery has dropped by 1-2%. It reminds me of using the HTC One X when it was released many years ago, or the infamous Samsung chip in the iPhone 6s.