When I got my S24 Ultra a month ago I was loving it. The battery easily lasted almost 2 days. However, since the One UI 7 update, I find myself topping it up at the end of the day or early evening. Not liking this.
After updates, battery life suffers because it's readjusting so you can either wait for the battery to recalibrate itself(give it a week or 2)
or
Clear the system cache by switching off the phone and connecting it to a computer, then simultaneously press volume up + power key until the recovery menu pops up, then use volume down to scroll to 'wipe system cache' and use the power button to confirm. Then reboot the phone and it should be good to go
