This year will be my first Pro Max. Natural Titanium coming Friday. Pretty excited for the larger display, better battery, plus all the things new to iPhone coming from my 13 Pro.That’s a pretty handy feature, especially considering how much battery life the iPhone 15 Pro Max has. It usually lasted about two days on a charge, which is slightly longer than other handsets of this size. Of course, over time, I expect battery life to deteriorate and average out at about one and a half days, based on previous experience.
quote from engadget.
doesn't sound like a battery issue