Battery

Hello alexissemae,

Thanks for posting in the Apple Support Communities!

We understand you're seeing a message regarding your iPhone battery health although it shows 100%, and you're looking for what to do, right?

Let's first make sure you're up-to-date with the latest iOS version on your iPhone to be sure that's not related to what you see. If an update is available, be sure you have a recent backup of your information before installing. To check for an update, go to Settings > General > Software Update. For assistance with updating or backing up your iPhone, check out the steps here: Update your iPhone or iPad - Apple Support

If you're up-to-date with the latest iOS version on your iPhone, you'll likely want to have your iPhone inspected by a technician to check into this. Check out the following details in relation to the message you see: iPhone Battery and Performance - Apple Support

Battery health degraded

If battery health has degraded significantly, the below message will also appear:

Your battery’s health is significantly degraded. An Apple Authorized Service Provider can replace the battery to restore full performance and capacity. More about service options…

This message does not indicate a safety issue. Your battery can still be used. However, you may be experiencing more noticeable battery and performance issues. A new replacement battery will improve your experience. More about service options.

Should you need further assistance, contact Apple Support directly to check into your service options with you.

Have a great day!