iPhone Performance and Battery Age

Reddit post from last week has sparked a discussion regarding iPhone performance as a function of battery age. While we expect battery capacity to decrease as batteries age, we expect processor performance to stay the same. However, users with older iPhones with lower-than-expected Geekbench 4 scores have reported that replacing the battery increases their score (as well as the performance of the phone). What’s going on here? How many phones are experiencing decreased Geekbench 4 score?

https://www.geekbench.com/blog/2017/12/iphone-performance-and-battery-age/

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