I get about 2 days worth of battery with 5g left on, on my 13 pro max. Granted I’m not a power user but I put about 5 hours of screen on time a day.

Phone came off charger around 3pm Monday I worked over night. Forgot to put phone on charger Tuesday and am now sitting at work at 23:38 with 23% of battery left. That will take me more then likely to shift end at 6am.