[simion314]

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.