About the battery and performance of iPhone 11 and later
Find out about the built-in software and hardware system that iPhone 11 models and later use to reduce performance impacts as your battery chemically ages.
The built-in software and hardware system is automatic, always on and works to provide the best possible performance as battery ageing occurs over time. The power needs of iPhone 11 models and later are monitored dynamically, and performance is managed so it can address these needs in real time. The system allows your iPhone to reduce performance impacts from battery ageing.
About performance as batteries age
While performance impacts are reduced as much as possible, battery ageing might still eventually lead to noticeable, possibly temporary, effects. Depending on the battery state and the tasks that your iPhone is handling, examples might include longer app launch times, lower frame rates, reduced wireless-data throughput, backlight dimming or lower speaker volume.
Check battery health on your iPhone
All rechargeable batteries are consumables and have a limited lifespan. Eventually their capacity and performance decline and they need to be replaced. To find out more about your iPhone battery health and if a battery replacement is recommended, go to Settings > Battery > Battery Health & Charging.
With iPhone 14 models and earlier:
With iPhone 15 models:
If your iPhone performance has been affected by an aged battery and you would like to get help with a battery replacement, contact Apple Support for service options.
Get battery information with iPhone 15 models
With iPhone 15 models, you can see when your battery was manufactured, when it was first used and the cycle count.
Tap Settings > General > About and scroll down to the battery section.
Learn more
When you use your iPhone, its battery goes through charge cycles. You complete one charge cycle when you’ve used an amount that represents 100 per cent of your battery’s capacity.* Find out about the charge cycles of lithium-ion batteries.
Batteries are a complex technology, and a number of variables contribute to battery performance. Find out more about the maximum battery capacity of your iPhone and when battery service is recommended.
This article applies to iPhone 11 models and later. Find out more about overall iPhone battery and performance.
* A complete charge cycle is normalised between 80 per cent and 100 per cent of original capacity to account for expected diminishing battery capacity over time.