Starting from iOS 11.3, iPhone has the ability to diagnose its own battery health and overall performance. To check your phone’s battery health results, please follow these simple steps: Open the settings. Then tap the battery. Finally, tap Battery Health. Seeing different information here allows users to have a deeper understanding of the health of the battery. So, what does the iPhone’s battery health reading mean?

Maximum capacity 100%

Showing 100% means that the battery can be fully charged and keep the charge as much as possible. The new battery should be able to reach its maximum capacity. The rating is directly related to the chemical integrity of the battery and how many hours of the active time the battery will give you before it runs out and needs to be recharged.

Battery capacity is less than 100%

This is a sign that the old battery has lost its full charge capacity. But it doesn’t matter that as time grows, the power of the battery will naturally decrease, which is just a general limitation of battery technology. Especially Apple batteries are designed to maintain at least 80% of their maximum capacity during 500 charging cycles. If you see that your battery power drops below 80%, this is a not-so-good situation, indicating that the phone’s battery has worn out and you need to replace it with a new version or replace the battery as soon as possible. This is usually accompanied by a message in the “Performance” section stating “Battery health is degraded”

 This phone turned off unexpectedly

This notification usually means that your iPhone has to restart due to battery issues. If the battery loses power unexpectedly or a similar problem occurs, your phone will shut down in an emergency. This sign indicates that you should pay close attention to battery performance and pay attention to any abnormalities. This may be caused by a one-time problem, such as your iPhone overheating in the sun. However, if your phone unexpectedly shuts down again and displays the same message, and you don’t see any additional information, then you should probably take your iPhone to a professional for a closer look.

 Implement performance management

This message means that the iPhone is carefully controlling the battery operation to prevent it from turning off again. It usually turns off or changes basic functions, such as dimming the screen brightness, and you may also notice that your phone is running slower than usual. If the shutdown is a one-time event, you can select the “Disable…” option to turn off performance management. Otherwise, leave it on and start thinking about replacing the battery.

 iOS can’t check the battery status

This usually happens when the battery wears out or malfunctions, and your iPhone cannot read it at all. This is a clear sign that you need to take your iPhone to an Apple store for repair or replacement. Apple will even provide you with service options in the performance section.

Important battery information

This notification will be displayed when Apple cannot verify your battery. This sign indicates that you are trying to use a copycat battery in your iPhone instead of the Apple-certified version. This is dangerous because it can cause overheating, power surges, and fires. Only use Apple-certified batteries and don’t let this message appear in the first place.