On Apple’s mobile operating system, a low-power state exists that conserves battery life when the device is not actively in use. This feature dims the screen, suspends background activity, and reduces processing power to minimize energy consumption during periods of inactivity. For instance, when a user presses the power button or a period of time elapses without interaction, the device enters this energy-saving state.
The availability of this function extends device usability by reducing the frequency of charging. It ensures that the device remains responsive and ready for immediate use when reactivated. Initially conceived as a simple power-saving measure, its implementation has evolved to incorporate intelligent algorithms that optimize power usage based on user habits and environmental factors.