New iPhone SE battery calibration
Hi
I heard that in order to prolong and improve Iphone battery life it is necessary to run battery calibration cycles at least once a month and after each IOS upgrade? Is it true?
I did this process already on my wife's new iPhone SE and now planning to do the same on mine, and later on our old iPad PRO.
I just want to be sure regarding the calibration necessity.
And if it is really beneficial, is there any apps (specifically designed for this purpose), which can drain battery more or less fast. Right now I am streaming Youtube video with flashlight on.
Appreciate in advance for any suggestions.
iPhone 3GS, iOS 4.3.3