The iPhone 15 is set to charge to a maximum of 80%. Why does it exceed 100%?

In iOS 13, Apple added a feature called "Optimize Battery Charging" to the iPhone. The purpose of this function is to reduce battery loss and play an important role in extending battery life. This feature extends battery life by reducing the time it takes for your iPhone to charge to full power.

When the feature is enabled, the iPhone will limit charging to above 80% in certain situations. Through machine learning, iPhone learns your daily charging habits and only enables Optimized Battery Charging when it is predicted to be connected to the charger for an extended period of time. The purpose of this is to protect battery life and reduce the impact of overcharging on the battery. This feature can help you better manage your phone's battery and extend battery life.

In the iPhone 15 series models, Apple has added a new "80% cap" option, which allows the iPhone to charge up to about 80% and then stops charging.

However, some users found that when using iPhone 15 series models, even if the 80% charging limit has been set, the iPhone will still be fully charged to 100%.

In this regard, users can check whether the iPhone 15 has been upgraded to iOS 17.1 or newer, because there are bugs in previous versions that may cause the system to ignore charging restrictions.

For iPhone 15 series model users who have upgraded to a newer version, if they find that the charge is still full to 100%, there is no need to worry too much about this problem.

Apple's official support document explains: When "80% cap" is enabled, iPhone will occasionally charge to 100% in order to maintain an accurate battery state-of-charge estimate. Therefore, this is not a battery abnormality problem, and you can continue to pay attention to the subsequent charging of the device.

If there is a system problem that prevents you from using the iPhone function normally, it is recommended to use the Apple phone repair tool, because it allows you to repair the system without clearing the device data, and can repair iOS system bugs, stuck There are more than 150 iOS system problems such as recovery mode, white apples, constant restarts, failed updates, etc.

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