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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...that they "protect the battery life performance of older iPhones" by AHEM slowing down your phone in software -

They ought to have a couple of options:
Toggle the speed back to original if you replace the battery (and ideally if you don't care about the battery performance/occasional purported shutdowns)

I agree, that's what they should do. Not for nothing but these bad optics were all apple's own doing. Had they openly offered a low performance/longer battery mode, it could have even been introduced as a positive user switchable option to increase the battery life. If it actually worked as advertised, some users might even want to enable it on new phones, why not. Instead they did it in secret and snuck it into updates as new models came out. This kind of behind the scenes engineering to intentionally make old models perform worse really adds fuel to the fire.

This video is as relevant as ever:

IDIOTS - iPhone Parody

Edited 2017-12-21 17:24 UTC

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