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    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.

    3 min read · 5 steps · Checked May 2026

    1. Step 1. Open the Settings app

      Find the gray icon with gears on your home screen or App Library and tap it. This opens your iPhone settings.

    2. Step 2. Scroll down and tap Battery

      Scroll about halfway down the Settings menu until you see the word Battery with a battery icon next to it. Tap it.

    3. Step 3. Tap Battery Health & Charging

      On the Battery screen, tap the option labeled Battery Health & Charging near the top of the page. This opens the battery health details.

    4. Step 4. Read your Maximum Capacity percentage

      At the top of this screen you will see a number followed by a percent sign — for example, 87%. This is your battery's Maximum Capacity. A higher number means your battery is in better shape. Below 80% means the battery has aged a lot.

    5. Step 5. Check the Peak Performance Capability message

      Below the percentage, Apple displays a short message about your battery's current performance status. If it says your battery is supporting normal peak performance, you are in good shape. If it mentions performance management or recommends service, your battery may benefit from replacement.

    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.

    Official sources

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