Message on my iPhone "battery not verified as an original product"

Please check that message again. It should say something like.......

Unknown Part

Unable to determine if your iPhone battery is a genuine Apple part. This could be because the part is non-genuine, not functioning as expected, or the installation is incomplete.

Diagnostics on your phone has determined that there may be a problem with the original battery.

Please make an appointment at the Apple Store or take the phone to an authorized Apple service shop so can run some checks and tests on the battery.

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

Good luck