I've been an iPhone user since launch, but this really is user-hostile behavior.

I understand why they did it, and it's not bad as a field-patch to a hardware bug, but doing it silently is pretty skeevy.

They should have mentioned this in the original battery recall, and displayed a warning on the battery screen in Settings, at the least.

> casual internet browsing, candy crush, and texting.

All these slow down as well. Try using instagram on low battery.

The problem is that this "Feature" is/was hidden, after 1 year when a new iPhone is launched and the person would test it , he will notice a big performance improvement so in a way he will be tricked to think the new iPhone is much more perform ant so he will be tempted to buy a new phone instead of replacing the battery. If instead he would be informed that his CPU runs at 50% because of old battery and that a battery replacement would fix the performance issue then the users would not feel cheated.

I noticed the slowdown. Never believed in planned obsolescence so I though it could be an optimisation problem in iOs 11 but problem persisted after several os updates.

I finally decided to upgrade to an X because how bad it was. Turns out it is throttling by as much as 50% (I still have the phone) so I could have just spent 79$ instead of buying a new iPhone.

The same will happen to a lot of people.