On what device?
Surely not the Xperia 10 (I) as the tag says?
Unless something goes awry in the background (and i should restart), i have plenty of battery left at the end of the day.
I have a 10 III that has been in use from day 1 of availability, which i charge to 90% during the night. Normal days i end at about 50% with moderate use. Not great; but certainly not terrible.