iphone 13 pro battery question

Look in Settings > Battery and see what it says for what apps and system tasks are using the most battery power. Some things can be temporary when new as it's sorting things out.

cofhwfa wrote:

I did, but i mainly use telegram/tiktok and reddit.

in total of 4 hours of usage, is it really normal for it to go down from 100 to 25 in 4-4.5 hrs of usage?

Really depends on what you're doing. There are some apps that are power hungry depending on what's going on. The display brightness doesn't necessarily show up as using battery power.

It's still a small battery, but most complex battery powered electronic devices do all sorts of things to reduce power consumption including shutting down sections that aren't needed at the time. It depends on what the apps you're using need.

Don't know what else to say other than you could have a problem with the battery, or just your use is doing something that isn't comparable to what others are doing.