How bout your brightness setting, did you set to the max ?

Did u set up brand new phone for your iphone 16pro? Or u directly clone your old iphone to new iphone?

Check your battery usage by app, see which app other than fb. If you got alot of app using gps one, try to disable it to only use while on the app.
And if your telco network is unstable on certain area, it might caused the issue as well. Especially 5g, try to disable to only use 4g.

ios26.1 will be release this coming 4th november 2025, which is 2 days from now, from zollotech claimed this ios26.1 best ever ios so far, so this time would be perfect for you to update 😆👍🐝

imo 1% drop after 150 cycles is quite good, although some people still remain 100% after 250+ cycles....

how do you charge your phone? stop at 80%? overnight?

How's your charging pattern? 150 cycles in 3 months? That's >1 charge per day, pretty heavy use. Pro or Pro Max?
Maybe iOS 26 drains more battery.

Anyway, above is the screenshot I took before I traded in my 16 Pro Max for 17 Pro Max.

do you let your battery percentage fall below 20% or like u just plug in whenever available until 80%?