Every year, the iPhone battery goes through the so-called degradation process. The useful battery capacity drops, and the smartphone works less and less. It turns out that the state of the battery affects not only autonomy, but also the performance of the device.
One of the users of Reddit with the nickname TeckFire compared the speed of two iPhones: his iPhone 6s and iPhone 6 Plus brother.
Both smartphones worked on iOS 11, but the 6 Plus released in 2014 on the A8 processor was faster than the iPhone 6s, introduced a year later, and received a more efficient A9 chip.
In this case, both devices differed in battery status. On the iPhone 6s, the battery degraded (lost capacity) by 20%.
As an experiment, a curious user decided to replace the battery in the iPhone 6s with a new one. Test results at GeekBench were frankly surprised.
– before battery replacement: 1466/2512 points;
– after replacing the battery: 2526/4556 points.
The difference in multicore testing is almost two times! Whence the conclusion follows that the processor of iPhones “listens” to the performance of the power controller.
Why does the iPhone slow down over the years?
Explain this behavior of the electronics of iOS devices as follows. For the average user, autonomy will surely be a priority over performance. Therefore, over time, the iPhone calculates the average operating frequency of the processor based on the battery capacity.
The conclusion is simple. Notice that your iPhone is creepy lagging on iOS 11? Check the condition of the battery (for example, using the Battery Life utility ) and consider replacing it. Performance gains guaranteed.