自iOS14推出後，不少用家都擔心更新系統後iPhone耗電量增加，早前就有外國YouTube頻道iAppleBytes進行實測，7 款舊型號iPhone在升級 iOS 14.4 系統後的耗電量，更比較過往iOS系統下的電池表現，發現有一款舊機升級後表現急升！
iAppleBytes在今次實測中就用了7款舊型號iPhone，分別為iPhone SE（第一代）、iPhone 6S、iPhone 7、iPhone 8、iPhone XR、iPhone 11、iPhone SE 2020。開始測試前7款手機的電池健康度都在96至100的良好狀態，7部手機都設置統一並擁有同樣數量的手機App，設定亦統一在25%螢幕光度及關閉自動調整光暗，以確保測試準確。
測試就將7款iPhone升級為iOS 14.4後，以長時間開啟螢幕的方式，使用同一款手機App來測試耗電量，結果發現iPhone 6S最快在3小時1分鐘就電源耗盡關機，即接圖睇7款iPhone的電量使用時間：
另外，iAppleBytes又公佈了各型號iPhone在過往iOS系統上的耗電量比較，結果發現有一款舊機升級後表現急升，即按圖睇文字詳情：
來源：iAppleBytes
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