The phone will be able to record when certain functions or applications are working. Whether early in the morning while getting ready for work, later in the evening when you return from work or maybe just on weekends? Then there is no need to applications or functions are involved all the time and wasting battery.
Based on the collected data, the iPhone will continue to decide when user will need to reduce performance or turn on or off the some of the functions to extend the battery life.
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