Why Battery Health Matters
When an iPhone battery degrades, iOS may automatically reduce performance (throttling) to prevent the device from pulling more power than the battery can provide. Symptoms of a degraded battery include:
App Lag: Applications taking longer to launch.
Stuttering: Lower frame rates while scrolling or gaming.
System Freezes: Occasional hanging or unresponsive touch controls.
Note: While older models (iPhone 6/7 series) feel these effects significantly, newer models (iPhone 8 and later) use more advanced hardware and software designs to make throttling less noticeable.
How to Check Your Battery Health
To access these insights, your device must be an iPhone manufactured after 2014 and running iOS 11.3 or later.
1. Verify Your Software
Go to Settings > General > Software Update to ensure you are on the latest version of iOS.
2. View Battery Stats
Navigate to Settings > Battery > Battery Health. On this screen, you will find two key metrics:
Maximum Capacity - A measure of battery capacity relative to when it was new. New phones show 100%.
Peak Performance Capability - Indicates if your battery is supporting normal peak performance or if performance management (throttling) has been applied.
