Battery health issue

Hello,

Depending on usage, that is normal and is nothing to worry about. Generally, Apple will replace the battery under warranty if the battery health falls below 80% during the first year.

See this link by Lawrence Finch for some battery charging tips:

When to charge your iPhone or iPad

Good luck.

Bearing in mind that that value is approximate and, most of all, is related to when the battery (not the iPhone) was new (see these support articles:--> iPhone Battery and Performance , and/or:--> Batteries - Maximizing Performance ), if you bought your unidentified iPhone model brand new, make an appointment (*) and have your device inspected at an Apple Store or AASP (Apple Authorized Service Provider) among this list:--> https://locate.apple.com/choose-country-region . 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.