Battery charge notification

Hi Robgyoung,

Welcome to Apple Support Communities. We understand that you are experiencing a notification sound that seems to be related to optimized battery charging.

When this happens, are there any other notifications on your iPhone Lock Screen? Does this sound like the sound your iPhone makes when you connect it to the charger? If so, it may be due to a faulty cable. Try another cable if possible and see if the same thing happens.

Next, restart your iPhone and test again.

Take care.

Robgyoung,

You're right that there is no setting to enable or disable sound for this notification. There should not be a sound for the optimized battery charging notification so this may be related to something else such as the connection to the adapter or power. Try another power source, cable and adapter if possible.

If the same continues, reach out to Apple Support for further assistance. You can reach out from Get Support or using the direct phone number for your region from Contact Apple for support and service.

Have a great day!