Apple might be slowing down old iPhones to preserve battery life

Reddit users have noticed that Apple appears to be slowing down old iPhones that have low capacity batteries. While many iPhone users have experienced perceived slowdowns due to iOS updates over the years, it appears that there’s now proof Apple is throttling processor speeds when a battery capacity deteriorates over time.
Geekbench developer John Poole has mapped out performance for the iPhone 6S and iPhone 7 over time, and has come to the conclusion that Apple’s iOS 10.2.1 and 11.2