On iPhone 15 models, iOS 18 will recommend users set a certain charging limit for their device based on their recent usage habits, with the aim of potentially improving their iPhone battery life by reducing the time the battery is fully charged .
All four iPhone 15 models have a setting that prevents the devices from charging more than 80% while turned on, and iOS 18 expands the feature by adding new charge limit options of 85%, 90%, and 95%. With the new limit options, iOS 18 now takes a proactive approach to improving battery life by recommending a specific charging limit to users through a notification.
The recommendation also appears in the Settings app under Battery → Charging. The charge limit feature remains exclusive to the iPhone 15 series in the first beta of iOS 18, with the option not found on the iPhone 14 Pro or older.
In a related change, anecdotal reports suggest that iOS 18 could recalibrate the maximum battery capacity percentage of some devices. In Settings ➝ Battery ➝ Battery Health, “Maximum Capacity” is a measure of battery capacity compared to when the device was new. A lower capacity may result in fewer hours of use between charges.
The first iOS 18 beta is available to Apple Developer Program members, with a public beta to follow in July. After beta testing is complete, the update should be widely released in September to all users with an iPhone XS or newer.
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