My 15 Pro Max battery is amazing. I followed some tips from a video. Sharing the link in case it helps.
battery tips
I use my 16 Pro Max for about 11 hours a day watching videos and scrolling Instagram. It usually takes up about 80% of the battery.
That’s so different from my experience. My base iPhone 16 has been fine. I charge it quickly in the morning and go to bed with 50–60% left. I use it for Spotify, Reddit, YouTube, and some reading before bed. I think many people have too many apps running in the background, which might be the problem.
I have the base 16 too. The only time I saw bad battery drain was during nonstop use on a hot day in the car without AC. Even then, it was around 10% per hour. Normally, I get 8–9 hours of screen time and over a full day of use.
I noticed a big difference after turning off background app refresh. My iPhone 14 Pro Max feels more responsive now too.