Your iPhone’s battery degrades over time, and there’s no way to bring the battery back to 100% health once the degradation begins.
As your iPhone ages (and as you repeatedly recharge it), the battery slowly loses its ability to hold power, and won’t last as long each day on a charge.
This is unavoidable, meaning you can’t keep your battery at 100% health once you start using it. However, Apple includes a way for you to monitor the health of your battery so you have an indication of when you might need to replace it.
Here’s how to check your iPhone battery’s health.
Table of Contents
What is Battery Health?
Battery health tells you how strong your iPhone’s battery is compared to when it was new. Over time, batteries lose their ability to hold a charge, which means your iPhone may not last as long on a single charge.
Apple provides a tool in your iPhone to check its battery health. You can see its Maximum Capacity (how much charge it can hold) and if it supports Peak Performance (how well it delivers power).
Check your iPhone’s battery health in Settings
The first thing you need to do is head to Settings > Battery > Battery Health. There, you’ll see your battery’s capacity, peak performance, and whether your battery needs to be serviced. If there’s anything out of the ordinary, your iPhone will let you know at the top of the screen on this page.
How to check your iPhone battery usage by app or time period
Interested in detailed information about your phone’s battery life over a 24-hour or 10-day period? Curious which apps cause the most strain on your battery? Or do you just want to get an idea of how much time you spend watching videos or listening to music? It’s simple—go to Settings and tap Battery, and all that information is readily available.
Steps to Check Battery Health on iPhone
Follow these simple steps to check your iPhone’s battery health:
- Open the Settings App
- Tap on the “Settings” icon on your iPhone’s home screen.
- Scroll Down to Battery
- In the Settings menu, find and tap the “Battery” option.
- Tap on Battery Health
- Inside the Battery section, you will see “Battery Health & Charging.” Tap on it.
- Check Maximum Capacity
- Look for the Maximum Capacity percentage. This shows how much charge your battery can hold compared to when it was new.
- Check Peak Performance Capability
- Below Maximum Capacity, check if your iPhone is running at Peak Performance Capability or if there’s a message about performance management.
If your iPhone is older and can’t upgrade to iOS 11.3, then you can’t check on battery health in Settings. However, you can ask Apple to run a diagnostic test on your battery for you. You can do this by visiting an Apple Store, or by talking to Apple’s customer support online.