Does the iPhone play a sound, when your phone is plugged in but shouldn't be eg battery optimization?

Hello istaBr!

Please provide more info! When would an iPhone be plugged in, when it shouldn’t be? Optimized Battery Charging is a feature that helps optimize battery life. To learn more, please tap Here.

And no. Your iPhone will not play sounds related to charging, battery, etc. when it is plugged in, under any circumstances.

I hope this is helpful. Good Luck!

You can leave your phone plugged in indefinitely without cause for concern