The battery is one of the most important components of every iPhone. Over time, its capacity decreases, which can cause shorter operating times, unexpected phone shutdowns, or a drop in performance. Fortunately, Apple makes it possible to quickly check the battery health without installing additional apps.
Where to check battery health?
To check the battery status:
- Open Settings.
- Go to Battery.
- Choose Battery health or Battery health and charging (depending on the iOS version).
You will find there the two most important pieces of information:
- Maximum capacity (%) – shows how much capacity is left compared to a new battery.
- Peak performance – indicates whether the battery is able to supply sufficient power for the proper operation of the device.
What does maximum capacity mean?
Apple acknowledges that the battery retains good health up to approximately 80% capacity.
Roughly:
- 100–90% - battery in very good condition.
- 89–85% – natural wear and tear, usually does not require replacement.
- 84–80% – the battery is noticeably worn out, operating time may be shorter.
- Below 80% – it is worth considering replacing the battery.
Messages worth paying attention to
If the iPhone displays messages such as:
- „Service in battery health,
- „Service recommended,
this means that the device requires diagnostics.
Why does battery health decline?
Battery consumption is primarily affected by:
- number of charge cycles,
- frequent discharging to 0%,
- using non-original or damaged chargers,
- intensive device usage.
This is a completely natural process – every lithium-ion battery loses its capacity over time.
Is it worth replacing the battery?
If your iPhone drains quickly, shuts down when the battery level is still relatively high, or its battery health has dropped below 80%, replacing the battery usually significantly improves the user experience.
It is worth choosing a service center that uses high-quality parts and performs a full device diagnostics after the repair.
Summary
Checking iPhone battery health takes less than a minute and allows you to assess whether the battery is still working properly. Regular monitoring of its condition will help you avoid sudden phone issues and plan a replacement well in advance.