Do you know that Apple Corp has been slowing down the speed of old iPhone in an attempt to upgrade you? We have long regarded it as a fantasy, but it has proved that Apple Corp has been doing similar things for the old iPhone since last year. In the face of a large number of iPhone battery aging, when the iPhone battery is closed under the peak energy load, the Apple will update the iOS so that the cell - shaped cell will slow down under heavy load. They did not limit everything iPhone did, but simply ensured that CPU would not collapse if there was not enough electricity. This will affect iPhone 6, iPhone 6 Plus, iPhone 6S, iPhone 6S Plus and iPhone SE. Here are a few questions. First of all, iPhone battery aging (we all know this), but we do not know that this will affect performance, thereby slowing down the speed of iPhone. Before Apple releases this software update, using iOS 10.2.1, iPhone battery status will not affect the way the phone works. Unfortunately, many iPhone switches off under load, which is problematic. For users, the biggest problem is that Apple has not told anyone. Software update is sure to ensure that iPhone continues to run effectively, but it affects performance if users are unaware of it. I met a couple of people who upgraded their iPhone 6 or 6S because they were very slow, and because they didn't charge, the iPhone battery didn't last long enough. If these people are aware of slowing down their speed, they may choose another route. One thing that many iPhone users don't know is that batteries can be replaced. Unlike Android phones, you can spend 20 dollars on a new iPhone battery, then take it off and replace it. Because you can't open the iPhone yourself, many people think you can't replace the iPhone battery. But Apple (and some mobile phone repair shops) can help you replace bad batteries. The Apple Corp charges 79 dollars for the maintenance, which is a reasonable price for me, so that the mobile phone can last for two years.So this is also a way to solve the iPhone battery aging Apple is facing huge demand. They have said that for iPhone 6+, you will not be able to get a new iPhone battery by March. Luckily, there are many iPhone battery manufacturers in the market. Their technology is very mature, the batteries they produce are very safe and the performance is very good.