The battery in the new phones is pretty spectacular, at least according to reviews, even when comparing it to last year's models.
With 11 Pro Max, I charge once every 1.5-2 days with regular usage. This is truly amazing to me, because I never have to worry about my battery dying midway through the day, and it feels extremely freeing.
But, if you are taking lots of pictures or about 15 mins of video, the battery seems to drain quickly, by about 45% as I was doing today.
The fast charge with the 18 W adapter is also very helpful.
On my S10 I now have a cheap $5 charging pad at the office, and I never really think about charging anymore when I get home.
Only on vacation trips I still have to budget my battery.