Last year, many users reported problems with iPhones 6s battery, which would be shutting down before the charge was completely depleted. Apple, claiming that this would have affected only a few units, has launched a program to change the affected batteries for free.
The company later admitted that more users had been affected and said it would release an update to correct this. The result was the release of iOS 10.2.1 which, according to Ma, would have reduced the problem by 80% on affected iPhones 6s and 70% on iPhones 6.
What was behind the scenes, however, was what Apple did and how it could affect device performance. At the Reddit, several users shared results by testing on their older devices after upgrading to iOS 11:
Wow, I just installed Geekbench and tried it with my (iPhone) 6 Plus. According to their website, my phone should have marked 1471/2476 (points) but actually it had 839/1377 which would explain why I, like you, have noticed that my phone has been noticeably slower lately.
Some speculated that Apple would be receiving too many battery replacement orders and then released an update to correct the problem. However, others say this was just a "hole-in-the-wall" measure, which eased battery problems but slowed down the devices: “Apparently, the way (Apple) did it was changing dynamically. it's the maximum processor speed relative to the voltage the battery is producing, so your phone can't drain much power and shut down. ”
Everything indicates that the problems are only completely corrected both the power down and the performance of the device only after the battery has been replaced, which many users have attested.
It is worth remembering, however, that much of what has been reported is not really "defects". That is, Apple makes it clear that the batteries in iPhones are designed to last about two years (it maintains up to 80% of their original capacity for 500 full charge cycles) and that many of these iPhones 6 / 6s may already be naturally experiencing. wear and tear over time.
Fortunately, iPhones 7 or later are unaffected as they are equipped with A10 or A11 processors, which have a different power management structure (certain cores handle high-intensity tasks and others with low power).
If you have an old device and it is still slower than normal, it might all work out with a battery change. To test the frequency of your processor, you can use the DasherX CPU app.
While this is not new, the big case here is that Apple would have intentionally slowed down its performance without revealing what was "discovered" now, becoming a major controversy. We'll see if the company takes a stand on the issue now that it has surfaced.