Check the maximum capacity and peak performance of the iPhone battery (the system needs to be updated to iOS 1 1.3 or later):
1, open the settings.
2. Find "Battery" in the drop-down menu and click Enter.
3. Click "Battery Health"
4. Check the maximum capacity and peak performance of iPhone battery after entering.
5. If the mobile phone battery can't provide peak performance, "Because the battery can't provide the necessary peak power, this iPhone unexpectedly shuts down. In order to prevent this kind of problem from happening again, the performance management mode is adopted. Deactivate? " Writing character model
6. If the health of the battery drops significantly, the following message will appear on the screen: "Your battery health drops significantly. To fully restore the performance and capacity of the battery, please go to an Apple authorized service provider for replacement. More information about maintenance options? "
If this message appears, it means that the performance of the iPhone battery is obviously insufficient. Although it will not affect the normal use, it is recommended to replace the battery.
Extended data
1, the chemical aging of the battery increased.
All rechargeable batteries are consumables, and with the increase of chemical aging of batteries, the performance of batteries will decrease. ?
With the increase of chemical age of lithium-ion battery, the amount of electricity that can be stored in the battery will decrease, which will shorten the time that the equipment can be used before it needs to be charged. The amount of electricity that the battery can store can be called the maximum capacity of the battery, which is relative to the new battery. In addition, the battery's ability to provide maximum instantaneous performance (i.e. "peak power supply") may also be weakened.
In order to make the mobile phone work normally, the electronic components in it must be able to rely on the instantaneous power of the battery, and one of the factors affecting the instantaneous power output is the impedance of the battery. High impedance batteries may not provide enough power for the system. When the chemical aging degree of the battery is high, the impedance may increase. In low power state and low temperature environment, the impedance of the battery will temporarily increase, and this increase will be more obvious with the improvement of chemical aging. These are the chemical characteristics of batteries, and all lithium-ion batteries in the industry are the same.
When power is obtained from a high impedance battery, the voltage of the battery will drop greatly. The normal operation of electronic components requires a certain minimum voltage. This includes the internal storage of the device, the power supply circuit and the battery itself. The power management system will judge the power supply capacity of the battery and manage the load to maintain the operation of the equipment. If the power management system cannot support the full-load operation of the equipment, the system will be shut down to protect these electronic components. Although the device was turned off on purpose, users may be surprised.
2. Maximum capacity of battery
The Battery Health screen contains maximum battery capacity and peak performance capacity information. ?
The maximum battery capacity measures the battery capacity relative to the new battery. With the increase of battery chemical aging, the battery capacity will decrease, resulting in a shorter battery service time between two charges. Depending on the length of time between iPhone production time and device activation time, the displayed battery capacity may be slightly lower than 100%.
Apple Support -iPhone Battery and Performance