i just bought an iphone 11

If it is brand new, I suggest that you make an appointment (*) and have your device inspected at an Apple Store or AASP (Apple Authorized Service Provider) among this list:--> Apple – Location Selector. After checking it out, they'll give you all the available options.

Regards

Giulio

(*) You can do it:

• Online:--> Genius Bar Reservation and Apple Support Options - Apple;
• Contacting a local Apple Store or AASP among the list provided above;
• Using the "Apple Store" app, available and downloadable from AppStore.

juggal0_p1ss ~ Did you buy your iPhone 11 from a reputable source?

And what's the Maximum Capacity % here?...

Settings > Battery > Battery Health

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