The iPhone 15 series is now official and with the new USB-C comes a new software feature. According to a source code found in the iOS 17 beta released to developers, Apple may allow you to limit the maximum battery charge on your new iPhones. It appears that the feature will only be available on the iPhone 15 series.
The feature itself is pretty simple: you limit the maximum charge to a certain percentage, which limits the time the battery spends at full charge, which should theoretically preserve the health of the battery over time. This obviously comes at the expense of not using the full battery and only brings benefits if you like to leave your phone charging for a long period, such as overnight charging.
Normally, iOS will display a message on the lock screen informing you that your iPhone will charge to its maximum capacity, and when this feature is enabled, it will warn you that it will only reach the maximum charge level you set.
Notably, this is different from the optimized battery charging feature seen on some Android phones, which would keep the phone at 80% and fill the rest just before unplugging the phone as it learns from your charging habits.
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