A battery replacement usually costs less than half a new phone and extends the life of a device that works fine otherwise

If your iPhone shuts down at 20% battery, drains in a few hours, or won't hold a charge through the day, the battery is likely worn out—not the phone itself. Apple and most repair shops can replace it for $50 to $100 depending on your model, while a new iPhone costs $800 and up. A fresh battery often restores a phone to normal performance for another two to three years, making replacement the practical choice for most people.

The real question is whether your phone still does what you need it to do. If the screen works, the processor handles your apps, and the camera is fine, a battery replacement makes financial sense. If the phone is also cracked, the screen flickers, or it's so old that apps no longer run smoothly, you may be better off replacing the whole device.

Key Takeaways

  • Battery replacement costs $50 to $100 at Apple or authorized repair shops, while a new iPhone starts at $800.
  • iPhones typically need a battery replacement after three to five years of normal use, when the battery health drops below 80%.
  • You can check your battery health in Settings > Battery > Battery Health & Charging to see the current capacity percentage.
  • Replacing the battery makes sense if the phone is otherwise functional; replacing the whole phone makes sense if the screen, processor, or other hardware is also failing.
  • Third-party repair shops often charge less than Apple but may affect your warranty, so compare prices and shop reputation before deciding.

How to check your iPhone battery health right now

Open Settings, tap Battery, then select Battery Health & Charging. You will see a percentage labeled "Maximum Capacity"—this tells you how much charge your battery holds compared to when it was new. A new iPhone shows 100%. At 80%, the battery is considered worn. At 50% or lower, the phone will shut down unexpectedly even when the percentage display says 15% or 20%.

You will also see a "Condition" line that says either "Normal" or "Service Recommended." If it says "Service Recommended," Apple is telling you the battery should be replaced. This does not mean the phone is broken—it means the battery is no longer reliable.

What a battery replacement actually costs

Apple charges $69 for an iPhone 15 battery, $79 for an iPhone 14, and $89 for older models like the iPhone 13 and earlier. These prices are for out-of-warranty replacement. If your phone is still under the one-year limited warranty and the battery failure is a manufacturing defect (not normal wear), Apple replaces it at no charge.

Authorized repair shops—Best Buy, Walmart, carrier stores—often charge the same as Apple or slightly less. Independent repair shops may charge $40 to $60, but quality varies widely. Some use genuine Apple parts; others use third-party batteries that may not last as long. Always ask whether the shop uses original or aftermarket parts before you commit.

A new iPhone 15 starts at $799. Even accounting for a battery replacement plus a screen repair or other minor work, you are still spending far less than a new device if the phone is otherwise sound.

When battery replacement makes the most sense

Replace the battery if your phone is two to five years old, the battery health is below 80%, and the rest of the phone works: the screen is intact, the camera is sharp, apps load quickly, and you do not have cracks or water damage. In this scenario, a $70 to $90 repair gives you another two to three years of reliable use.

Battery replacement is also the right move if you like your phone's size, camera, or features and do not want to learn a new operating system or lose your setup. The cost is low enough that keeping a familiar device makes sense.

When to replace the whole phone instead

Buy a new phone if the screen is cracked or the display flickers, because screen repair often costs $200 to $400—nearly as much as a used iPhone. If the phone is more than six years old, apps may no longer run smoothly even with a new battery, because the processor cannot handle current software. If the phone has been dropped in water and the battery is one of several failing components, the total repair cost may exceed the price of a refurbished phone.

Also consider replacing the phone if you are paying for a monthly plan that includes device upgrades, because the upgrade cost may be lower than out-of-pocket repair. Check your carrier's upgrade pricing before you decide.

Where to get the battery replaced

Apple Stores and Apple's mail-in repair service are the safest choice if you want a genuine battery and full warranty coverage on the repair. You can book an appointment at apple.com or call your local store. Turnaround is usually one to three days for in-store service.

Best Buy's Geek Squad, Walmart, and carrier stores (Verizon, AT&T, T-Mobile) all offer battery replacement at competitive prices. Call ahead to confirm they have your model in stock and ask whether they use genuine or third-party batteries.

Independent repair shops are often faster and cheaper but vary in quality. Check Google reviews and ask whether the shop is certified by the manufacturer. Some independent shops offer a warranty on the battery itself (usually one year), which is worth asking about.

What happens to your phone after battery replacement

A new battery restores the phone to normal performance. The screen brightness will not change, the processor speed will not increase, and the camera quality will not improve—but the phone will no longer shut down unexpectedly, and it will hold a charge through a full day of normal use. You should see the battery health percentage reset to 100% in Settings.

The replaced battery will degrade over time just like the original. Most iPhone batteries last three to five years before capacity drops below 80% again. If you keep the phone for another three years after replacement, you may need a second battery replacement—but that is still far cheaper than buying a new phone.

Frequently Asked Questions

Will replacing the battery void my warranty?

No. Apple's warranty covers the repair itself, and the battery comes with a one-year warranty on the replacement part. If you use an authorized repair shop, the warranty is the same. Third-party repair shops may offer their own warranty on the battery but not on the phone itself.

Can I replace the battery myself?

iPhones are glued shut and require special tools to open safely. Self-repair risks damaging the screen, logic board, or water seals. Unless you have experience with phone repair, the cost of tools and the risk of breaking something else makes professional replacement the better choice.

How long does battery replacement take?

Apple Stores usually complete it in one to three days; some locations offer same-day service if you arrive early. Independent shops often finish in a few hours. Mail-in service through Apple takes five to seven business days plus shipping time.

What if my phone is still under warranty but the battery is worn out?

Contact Apple or your carrier. If the battery failure is a manufacturing defect (not normal wear from age), it is covered at no charge. If the phone is older than one year, you will pay the standard replacement fee.

Is a refurbished iPhone cheaper than battery replacement plus keeping my old phone?

A refurbished iPhone typically costs $300 to $500 depending on age and condition. If your phone is otherwise functional, a $70 battery replacement is far cheaper. Refurbished phones make sense only if your current phone has multiple failing parts or is so old that apps no longer run well.