Battery draining quickly on my new iPhone 15 Pro

Sounds as if you may have Optimized Charging Enabled.

About Optimized Battery Charging on your iPhone - Apple Support

My 15 Pro battery is also weak. I use my phone moderately - no intense gaming, no streaming, no video editing, no massive picture taking, no phone calls, just scrolling through twitter or the news, listening to podcasts when I go pick up lunch or go for a 30 minute walk, or deleting emails while on the 🚽.

I wfh, so I've got my macbook in front of me all day, and my ipad near me, and I use both of those a lot more than my iphone, and still I can't get the battery to last more than a day.

While it's definitely better than my iphone 8, it's nowhere near as good as I expected for being my first new phone in 6 years :-/

kamrul_hashan wrote:

But as per Apple turning off charging optimizations can increase wear on your battery and reduce its lifespan.

The person to whom you're replying doesn't appear to have said anything about turning off optimized battery charging. They said they turned off always on display.

I had the same issue with 14 Pro Max. Had to turn off always on.

Yeah, it's enabled from the first day.

But as per Apple turning off charging optimizations can increase wear on your battery and reduce its lifespan.