The scandal of iPhones batteries unveiled late last year is a policy that Apple doesn't want to revive at all. After users discovered that the company was quietly slowing down the performance of older devices to preserve their battery, a huge public relations crisis set in in Cupertino and forced the giant to take a series of measures to curb it.
One such measure is the appeal Battery Health, present from iOS 11.3 and which allows users to track the integrity level of the cell and when it should be changed. For older devices, the feature also has the extra option of turning off the performance management that is, your iPhone's processor will run exactly as it did when it came out of the box, but your battery may last less and the device may shut down abruptly if the charge level is too low.
Originally, this option was only available for iPhones 6, 6 Plus, 6s, 6s Plus, SE, 7 and 7 Plus, because at the time, iPhones 8, 8 Plus and X were still too young to need anything like this. Now, plus: With iOS 12.1, iPhones 8, 8 Plus and X also gained performance management (and therefore the option to turn it off).
The simple justification: With some handsets of the 2017 line already reaching the first birthday, it is natural that their batteries begin to lose capacity or other intrinsic failures. With the news, Apple can preserve the battery of devices and give users the option to turn off the feature for maximum performance at all times that is exactly what it should have done from the beginning.
According to Ma, however, performance management on newer iPhones may be less noticeable due to their more advanced internal components. See what she reported on this support page:
This performance management works by analyzing a combination of device temperature, battery charge state, and battery impedance. IOS dynamically manages the maximum performance of some system components, such as CPU and GPU, to avoid unexpected shutdowns only if these variables require it. In this way, device workloads will be automatically balanced, allowing for a better distribution of system tasks rather than faster and higher performance peaks at once. In some cases, the user may not notice differences in daily device performance. The level of change perceived will depend on how much performance management will be required for a given device.
So when upgrading your iPhone 8/8 Plus / X to the new version of the system, make sure things are running smoothly and if you want to, turn off the performance management feature.
Has anyone noticed any difference?
via The Verge