Lately when I see movies there is an ad beforehand for abandoning the iPhone for a Samsung Android device. A frustrated woman takes her iPhone 6 to an Apple store and when asking for the phone to be fixed she is told "You could turn off the performance management feature, but it may lead to unexpected shutdowns." to which she replies "battery throttling" and I know exactly what she means. I would have kept my iPhone 4S forever if it had not grown sickly over time. Towards the end I was carrying a portable battery to try to keep it alive.