How to Check Your iPhone's Battery Health with iOS 11.3

Apple landed in hot water with customers this year when a feature designed to slow the processors of older iPhone models to keep them from suddenly shutting down came to light. Critics maintained that Apple was throttling the speed of earlier iPhone models to push customers towards newer devices, while Apple insisted that the feature was necessary to cope with aging batteries. Now, with iOS 11.3, Apple is letting iPhone users decide for themselves how to manage their iPhone's battery health and processor speed. The first step in this process is making battery health visible, so customers can decide if and when they'd like to replace their battery. Let's get started learning how to check your iPhone's battery health in iOS 11.3, it's quick, easy, and a valuable piece of information about your device. Note that this feature is only available for iPhone 7, 6S, and 6 models.

Related: How to Care for Your iPhone or iPad Battery  

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New for iOS 11.3: How to Check Your iPhone's Battery Health 

To accomplish your battery health check, you'll need to update to iOS 11.3. After you've updated:

  • Open the Settings app.
  • Scroll down and tap on Battery.

iphone batterythrottling

  • Now tap on Battery Health.
  • You'll see your battery capacity next to Maximum Capacity.

check iphone batterymaximum battery capacity

The Maximum Capacity tells you your iPhone battery's capacity as compared to the capacity it had when it was brand new. 

If your battery's maximum capacity has dropped below 80%, a message like this will pop up on your screen:

peak battery performance 

At this point, you may want to consider replacing your battery to improve your iPhone's performance and the amount of time it can operate between charges.

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Leanne Hays is a Feature Web Writer at iPhone Life.  She loves reading and blogging, and is never without a book in her backpack or an audiobook on her phone. Short-term goals include finishing painting her house and starting an aquaponics farm, long-term goals include a bike tour of Italy and writing a novel.