Apple recently confirmed that it was slowing down some iPhones that have degraded batteries. The company said that this only affected handsets from the iPhone 6 and above. They are now offering a $29 battery replacement on the iPhone 6 and above.
What about older handsets like the iPhone 5S, there have nee rumors that Apple may be slowing down older handsets than the iPhone 6. This video put this theory to the test and runs a number of different versions of iOS on the iPhone 5S.
In the video below we get to see the iPhone 5S running iOS 8.4.1, iOS 9.3.5, iOS 10.3.3, iOS 11.2.1 and the new iOS 11.2.5 beta. A number of benchmarks are run on the five iPhone 5S handsets.
As we can see from the video there are no major differences in the benchmarks and Apple does not appear to be slowing down the iPhone 5S like it is with the iPhone 6 and other devices.