iPhone 13 triggering false overheating warning, battery decline (4 months old)

On an iPhone warnings are never false if you have not Jailbroken your device.

📱Facing iPhone heating issues? Here's what worked for me on my iPhone 12 Pro:

1️⃣ Backup on iCloud/iTunes

2️⃣ Log out of Apple ID

3️⃣ Erase (Keep eSIM Data)

❌ DO NOT restore from backups! Set up as new iPhone. Wait 2-3 days - no issue! That Indicates...

✅ No hardware/ iOS issue

Now...

📦 Restore data gradually

🔍 Find app/settings causing heat

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.

Shenanigans! Mine is doing the same thing. I have not jailbroken my iphone, it can sit in front of an ac for hours until it is very cold to the touch powered down and it will throw the warning before I can enter my 6 digit password. And yes it's been factory reset, and no I haven't even been able to restore it at all because it "overheats" before I can even get to an option to restore it or sign into any accounts

Heeb-a-jeeb wrote:

Shenanigans! Mine is doing the same thing. I have not jailbroken my iphone, it can sit in front of an ac for hours until it is very cold to the touch powered down and it will throw the warning before I can enter my 6 digit password. And yes it's been factory reset, and no I haven't even been able to restore it at all because it "overheats" before I can even get to an option to restore it or sign into any accounts

What did the staff at the Genius Bar tell you when you took it in to have them check it?

Heeb-a-jeeb wrote:

Shenanigans! Mine is doing the same thing. I have not jailbroken my iphone, it can sit in front of an ac for hours until it is very cold to the touch powered down and it will throw the warning before I can enter my 6 digit password. And yes it's been factory reset, and no I haven't even been able to restore it at all because it "overheats" before I can even get to an option to restore it or sign into any accounts

What the original poster described was not an iPhone overheating. They were seeing the normal alert for Optimized Battery Charging and not understanding it. If an iPhone is overheating, it will shut down, not just stop charging.