How to know if it is necessary to change the battery of your iPhone?

How to know if it is necessary to change the

The battery of a phone sees its performance decrease over time. Its lifespan depends on the use, the number of charge cycles and the maintenance of the phone. How to check the health of your iPhone battery?

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What are the warning signs warning you to change the iPhone battery? Good question ! Chemical aging of batteries lithium-ion causes a decrease in their autonomy : over time, the maximum battery capacity decreases, which means that you are no longer able to fill it to 100%. Its maximum performance (peak power) is also reduced, and its impedance increases, which results in a drop in voltage at the battery terminals and affects its overall operation.

The following signs may be associated with a used battery:

  • autonomy reduced to a few hours or even a few minutes;
  • launches ofapplication slower;
  • reduced loudspeaker volume;
  • battery that tends to overheat.

These problems are accentuated when it’s cold or the battery is weakly charged.

Where can I find the battery wear level?

The iPhone battery is designed to retain up to 80% of its original capacity after 500 charge cycles complete under normal conditions of use. Since iOS 11.3, an application allows you to check the battery status. It can be found in Settings> Battery> Battery status. The maximum capacity of battery as well as the activation or not of dynamic performance management. Below a maximum capacity of 80% or if an alert message appears in the “Optimal performance capacity” tab, this is a sign that your battery is exhausted.

Apps to know when to change the battery of your iPhone

If your iPhone version is older than iOS 12, you can download a dedicated battery health analysis app, like Battery Life, Battery Testing, or Battery iDoctor. The CPU-x application allows you to query iPhone system information, including battery level, capacity, voltage, and wear rate. Warning: If you have iOS 12 or later, these apps will no longer be able to indicate the level of battery wear.

In any case, it is strongly recommended to have your iPhone battery changed with Apple (75 euros if the iPhone is no longer under warranty) or with an authorized repairer. There are also toolkits and tutorials to replace the battery yourself, but this requires a certain dexterity.

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