Battery

models that use Face ID have the notch, which limits the amount of room in upper corner.

So you can pull down from the upper right to access Control Center, which will show you the percentage

Or you can ask Siri

Or you can place a battery widget on your Home Screen or your Today View

Use widgets on your iPhone and iPod touch - Apple Support

Bern10 Said:

"Battery: How can i see battery percentage in iPhone 13"

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Looking for the Battery Health?:

When the Battery Health is 80% or lower, it is time for a new battery. So, go here...

1. Go To: Settings
2. Tap: Battery
3. Tap: Battery Health
4. View: Percentage.
5. Is it less than 80%?