Linked by Thom Holwerda on Wed 20th Dec 2017 17:36 UTC

A 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?

To answer these questions I've plotted the kernel density of Geekbench 4 single-core scores for the iPhone 6s and the iPhone 7 running different versions of iOS. Scores obtained in low-power mode are not included in the distribution.

Evidence seems to be mounting that Apple is decreasing the clock speed of iPhones with decreased battery capacity to maintain the advertised battery life.

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RE[2]: It is true
by galvanash on Fri 22nd Dec 2017 00:10 UTC in reply to "RE: It is true"
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If they can detect a failing battery well enough to adjust the clock speed to make it last longer (as they say), why can't they just tell the user "Your battery is failing. Time to get your phone serviced."?

I mean I understand that batteries generally degrade over time, and eventually they will start behaving badly. But they are replaceable, Apple themselves offer service to replace batteries. Why not just tell the user they need service instead of silently gimping their phone behind their back???

I mean I know why... It's a rhetorical question.

Shame on Apple.

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