iPhone's battery gets very hot
The iPhone gets very hot even when it's just in your pocket. all applications are closed, but I feel through my pocket that the phone is warm and discharged by 25% in 3 hours
[Re-Titled by Moderator]
iPhone 12, iOS 16
The iPhone gets very hot even when it's just in your pocket. all applications are closed, but I feel through my pocket that the phone is warm and discharged by 25% in 3 hours
[Re-Titled by Moderator]
iPhone 12, iOS 16
vladlen193 wrote:
.... and discharged by 25% in 3 hours
If your iPhone's battery is draining even when it's not in use, there could be a few possible reasons for this issue. Here are some steps you can take to troubleshoot the problem:
If none of the above steps resolve the issue, it is recommended to reach out to Apple Support or visit an authorized service center for further assistance. They can provide specific guidance based on your device model and iOS version.
vladlen~ Does your iPhone 12 still have its original battery?
And what's the Maximum Capacity % here?...
Settings > Battery > Battery Health & Charging
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vladlen193 wrote:
The iPhone gets very hot even when it's just in your pocket.
When I had a somewhat similar issue, here is what I did...
I continued to have the same issue with the heating.
I repeated the above steps but this time I did not restore from the iCloud Backup. I set it up as a new iPhone.
Waited for 3 days. There is no heating issue, now.
Conclusion.:
Action Plan:
Now the heating issue isn't there anymore. I am adding apps one by one and keeping tab on the heating issue.

My experience says this is purely caused by some third-party app that you may have installed.
I am not aware of the ambient temperature in which you are using the iPhone. However --> Keeping iPhone, iPad, and iPod touch within acceptable ...
Store the device where the temperature is between -20º and 45º C (-4º to 113º F). Don’t leave the device in your car, because temperatures in parked cars can exceed this range.
Use iOS devices where the ambient temperature is between 0º and 35º C (32º to 95º F). Low- or high-temperature conditions might cause the device to change its behavior to regulate its temperature. Using an iOS device in very cold conditions outside of its operating range might temporarily shorten battery life and could cause the device to turn off. Battery life will return to normal when you bring the device back to higher ambient temperatures. Using an iOS device in very hot conditions can permanently shorten battery life.
vladlen193 wrote:
.... and discharged by 25% in 3 hours
If your iPhone's battery is draining even when it's not in use, there could be a few possible reasons for this issue. Here are some steps you can take to troubleshoot the problem:
If none of the above steps resolve the issue, it is recommended to reach out to Apple Support or visit an authorized service center for further assistance. They can provide specific guidance based on your device model and iOS version.
Original 100% half year old
vladlen ~ The Maximum Capacity % should not be 100% after half a year. A genuine iPhone battery's capacity should decline by 1 or 2% each month of normal use. Go to Settings > General > About
...Does it say anything about the battery?
iPhone parts and service history - Apple Support
...Found by searching Apple's Knowledge Base.
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vladlen ~ Please post a screenshot of this Settings pane:
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iPhone's battery gets very hot