First, download the installation assistant in the computer and open it in the PC.
Then connect the device to the computer through the data cable, and then the assistant will automatically identify your device and read your device information. In the device information, the "Charge Times" and "Battery Life" of the battery will be displayed, as shown in the following figure:
Among them, "charging times" represents the cycle charging times of the battery. If the equipment is new or used for a short time, the number of cycles detected is generally single digits. When it is detected that the battery cycle times of an iPhone are too high, it means that the phone has been used for a long time. If the battery life is too low, it is recommended to replace it with a new one to avoid affecting the battery life of iPhone.
You can click on the battery details behind "Battery Life" to view the updated battery information. You can view the battery capacity, serial number and other details in detail.
IPhone has a built-in rechargeable lithium battery like iPod, but unlike most mobile phones, users can change their own batteries. After the iPhone is connected to the computer, it can be charged synchronously from the Dock cable through USB, just like charging the iPod. In addition, USB can be charged directly from the wire connected to the AC power outlet.
For the quality of the iPhone battery, Apple conducted about 400 tests when preparing for production to determine the battery life. Apple's website says that the battery life has been tested after about 400 charging cycles, and its design can maintain 80% of the original total power consumption, which is equivalent to the battery of iPod.