How to Check Your iPhone's Battery Health
Find out how worn down your iPhone battery is and when it may be time to get a replacement — in just a few taps.
At a Glance
Open the Settings app
~15sScroll down and tap Battery
~15sTap Battery Health & Charging
~15sRead your Maximum Capacity percentage
~16sCheck the Peak Performance Capability message
~15sYou Did It!
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Over time, every rechargeable battery wears out. Your iPhone battery is no different. Apple builds a tool right into the iPhone that lets you see how much your battery has aged — no app download needed.
This guide will walk you through exactly where to find that information, what the numbers mean, and what to do if your battery is no longer holding a charge like it used to.
Why battery health matters
A brand-new iPhone battery can hold 100% of its original charge capacity. After a year or two of daily charging, that number drops. When it falls below about 80%, you may notice your phone dies faster than it used to, or in some cases, the phone shuts down unexpectedly even when the battery showed charge remaining.
Apple's Battery Health tool shows you a percentage that tells you how much of that original capacity your battery still has. This helps you decide whether a battery replacement might be worth considering.
What the percentage means
- 100% — Brand new or nearly new
- 90–99% — Good, no action needed
- 80–89% — Battery is aging but still performing well
- Below 80% — Apple considers this a much degraded battery. You may want a replacement
How much does a replacement cost?
As of 2026, Apple charges $99 to replace an iPhone battery at an Apple Store or Apple Authorized Service Provider. In many cases this dramatically extends the useful life of your phone. You can book a repair appointment at apple.com/support.
Quick Tip:
If your phone is under a year old or covered by AppleCare+, a battery replacement may be free or discounted. Check your coverage at mysupport.apple.com before paying out of pocket.
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