Ever since iOS 11 came out I had experienced a significant
performance issue on my iPhone 6S. Animations and transitions were
slow, app loading was noticeably and unbearably slower than iOS 10
and my battery was draining faster. Many rumours swirled that
others were experiencing this but not all.[…]
Then several weeks ago a Reddit conversation started spreading
online that presented possible evidence Apple was reducing the
performance of their iOS and possibly laptops when the battery
life was sufficiently degraded. That day I decided to test the
theory by getting my battery replaced at the Apple Store.
[…] After I confirmed with her that I was not using it that
heavily and the battery setting statistics also didn’t show an
application using a large percentage of the battery she suggested
a rogue system process that somehow persisted through upgrades and
She also let me know that my battery was at 83% health and that
Apple won’t even do a replacement unless it’s below 80%.
So I went home and immediately did a local backup, wipe and
restore. And voila! Performance issues were gone.