On these smartphone models, it is possible to dynamically adapt the refresh rate of the screen, and instead of going to turn it off completely, the system only lowers the refresh rate to 1Hz and then darkens everything that is visible.
The result is a lock screen that always manages to show the clock, any widgets, notifications and even the system wallpaper, albeit in a darker version.
When Apple launched this novelty it also stated that the impact on battery life would not have been very high but in reality it has been found that the always on affects quite significantly. One test estimated that keeping the screen always on for 1 hour drains the battery by 0.8% which, over a whole day if the screen was always on, would correspond to about 20% of the total charge.
Over time and with the update to iOS 16.2, Apple has begun to offer a further possibility to users, namely that of completely eliminating the background (and also the Notifications if desired) when the phone is in Always-on mode. Whoever enables this option, instead of darkening it, will completely replace the background with a black image and a black pixel, on OLED-type screens, corresponds exactly to an off pixel.
The expedient that we have just described still allows you to keep the time and the other components always visible on the screen, deactivating only the background. It is estimated that in this way the impact on the battery is lower, equal to 0.6% per hour or 14% in 24 hours.
These just described are only estimates obtained with a test but in real use the percentages could be different or in any case vary according to the background. It is possible that Apple has received several complaints from users regarding the battery life of the iPhone 14 Pro and 14 Pro Max and that this has led the company to add another trick.
In fact, traces of a new function have been found within the iOS 16.4 beta 1 code that will be implemented in the Settings => Battery section.
It seems that Apple will soon allow us to obtain more detailed information on the battery consumption generated by the always-on screen and that this data will be easy to find and read on the dedicated screen.
In this way, first of all, each of us will be able to acquire a greater awareness of the use of the telephone and then, secondly, it could be useful for Apple support to explain to users that a (more or less important) part of battery consumption depends on the screen being always on, inviting them to look at that data and possibly evaluate the idea of deactivating the function, causing the screen to turn off completely when the phone is not being used.
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