Came from the 14 Pro Max to the 16 Pro. Battery does not come close. Full day use on the 14 Pro Max would result in 20% battery left at the end of the day. 16 Pro is dead by 8:30pm-9pm unless I actively use it less or top up. Picked up the 16 Pro Max, and really dislike the size. I think I am just sick of the huge size and this year, the PM is even bigger (I don't have small hands either...the phone is just huge to carry around, not pocketable at all.) For ***** and giggles, I tested the battery burn rate when recording 4K 120Hz in full sun, and the phone drains about just a bit over 1% per 1 minute so depending on how you are using it and in what conditions, the Pro may last well below a normal day if I am vacationing and recording at the beach or under water. Despite this, I am still facing a huge dilemma on which one to keep. I genuinely dislike the huge size of the Pro Max.
FWIW, I also have the 16 Pro Max. Battery life per day is no better than the 14 Pro Max and it is pretty much exactly 20%-30% better than the Pro, which is basically the size difference between the two batteries.