情報來源：
https://tinyurl.com/yyt4susd
The iPhone XS and XR will get processor throttling feature with iOS 13.1
iphone XS and XR 在iOS 13.1會得到處理器弱化功能
Apple will add its processor throttling feature to the iPhone XS and XR next
week with the upcoming iOS 13.1 update. The feature, which was controversial
when first discovered in 2017, limits some iPhones’ performance to prevent
random shutdowns due to aging batteries. The feature is only supposed to be
active when a phone has an older battery, but those affected have previously
complained about noticeable slowdowns of their devices when it happens.
蘋果在iOS 13.1對iphone XS & XR加入電池老化時處理器的弱化功能。這個功能在
2017造成很大的爭議，導致後來蘋果送低價換電池。被弱化的iphone速度會非常慢
The feature was discovered when iPhone owners noticed that older phones would
speed up after a battery replacement. Apple eventually became more
transparent about the feature, detailing how it worked and temporarily
offering discounted battery replacements as a mea culpa. It later updated iOS
so that, even if your phone is at risk of random shutdowns, you can turn off
the processor throttling feature to regain full performance. The feature will
only be activated after the iPhone detects an unexpected shutdown because of
battery issues.
心得：
恭喜 iphone XS & XR獲得弱化。
不過至少現在這個功能應該是可以自己關掉的～
不過有天你的手機突然變慢的時候可以去看一下