So you're trying to tell me this battery issue with millions of iPhones turning off has been happening for the past 7-8 years before the iPhone 6 and 6s?
Weird, I been here since 2008 and didn't see any of it. Please enlight me.
Battery does degree and will not hold charges like new battery does. This is fact. Battery precentage reported on cellphone, laptops are not entirely accurate.
A device with weares out battery will have issue with random shut down. While my almost 10 years old Acer laptop still works, battery will not stay more than 5 minuts. Laptop will shutdown even it says 95% battery.
That being said, I haven't had random shutdown with any of my phones, including iPhone 5. That is high depends on each individual devices. People charging their devices differently. I never let my devices have less than 50% battery.
Regarding with iPhone 6 and 6S. I do believe that they use cheaper cells. There are recalls with iPhone 6S battery. I think Apple need switchs to better quality battery cell, instead cheap and lower quality cell
[doublepost=1515035666][/doublepost]
Except it's not just based on one measure:
"This power management works by looking at a combination of the device temperature, battery state of charge, and battery impedance. Only if these variables require it, iOS will dynamically manage the maximum performance of some system components, such as the CPU and GPU, in order to prevent unexpected shutdowns."
from https://support.apple.com/en-us/HT208387
That covers lots of stuff and lots of variables. Bascially Apple is covering themselves from future damages.
If it turns out replacing battery does not fix the problem, Apple can tell you, well maybe something else.
This blanket statement is means nothing to consumers.