This notification is a part of theBattery Optimisationfunctionality offered by iOS 16.
However, if the heat increases, Apple puts the iPhone charging on hold.
While we suggest users to let the iPhone cool down normally.
it’s possible for you to try the workarounds mentioned below.
Here is how to fixiPhone charging on holdissue by turning off optimized Battery Charging features in iPhone.
If you have an air conditioner in your vicinity then turn it on.
Once the iPhone cools down then the battery charging will resume automatically.
This feature either completely stops or slows down battery charging.
Earlier, this feature used to work silently in the background without any alerts.
However, with iOS 16 users now get a notification when the iPhone battery stops charging that readsCharging OnHold.
There you’re able to also find out the duration for which your iPhone charging was on hold.
Luckily, if required this feature can be turned off.
So clearly this alert is neither an Error nor a Problem.
You will need to Visit Apple care in that condition.
While there is a DIY on How to fix it but we will not suggest trying it.
Keep background apps in check.
Low brightness and other features to decrease the load on your iPhone thus avoiding heating in iPhone.
source: www.techworm.net