I am iphone 14pro user . My phone suddenly starts battery aging. It got heat up when the phone is on charge.
Take a look at this link...
Batteries - Maximizing Performance - Apple
You haven't mentioned your Battery Health which can be found in Settings > Battery> Battery Health. when this figure reaches 80%, it will be time to make an appointment at the nearest Apple Store for Battery Replacement...
Battery Health & Performance
Your battery health is fine and is undergoing normal usage. iPhone batteries, like all rechargeable batteries, are consumable components that become less effective as they age. You should change out the battery once your Battery Health reaches below 80% which will take over 2 years to reach under normal usage. Until then enjoy your iPhone.
Here is some more reading on an iPhone battery and its performance ➡️ iPhone Battery and Performance - Apple Support
Axel F.
How to stop my battery aging?
