Battery health dropped from 99% to 96% in 10 days

Apple rounds up the battery percentages to a whole number (no decimal points). In reality your charge of 99% was 98.1 and 10 days later was 96.9, a change of only 1.2%. Changes look dramatic, but in reality it only dropped a little.

Monitor the battery health percentage over a longer period of time ideally 90 days or longer for a true indication of your battery’s health.

You did not answer our questions.

We are not convinced that you bought a new phone. If you did, your battery is not performing well at all.

Make an appointment at the Apple Store / Genius Bar or authorized Apple service shop to have them check and test the battery.

You can find a list of authorized shops in your area using this link:

Find Locations

The iPhone 15 was discontinued in September 2025, so your iPhone is at least 10 months old, possibly much older.

If you bought the phone 3 months ago......you did not buy a new iPhone 15.

What is the name of the dealer that sold you the phone?

Where are they located?