You can replace an iPhone battery yourself with the right tools, but Apple's official service is safer for most people

Replacing an iPhone battery means opening the phone, disconnecting the old battery, and installing a new one. You have two main routes: do it yourself with a kit from a third-party seller, or take the phone to Apple or an authorized repair shop. The DIY route costs $20 to $50 for tools and a battery. Apple's battery service costs between $69 and $99 depending on your model, takes three to five business days, and includes a warranty on the new battery. The DIY route is faster but risks damaging the screen, logic board, or water seals if you slip with a tool.

Before you choose a route, check your battery health. Go to Settings > Battery > Battery Health & Charging and look at the "Maximum Capacity" number. If it is below 80 percent and your phone is slowing down, shutting off unexpectedly, or not holding a charge through the day, a new battery usually fixes it. If the screen is cracked, the phone has water damage, or the logic board is failing, battery replacement alone will not solve those problems.

Key Takeaways

  • Apple's official battery replacement costs $69 to $99, includes a warranty, and takes three to five business days at most locations.
  • DIY battery replacement requires a pentalobe screwdriver, spudger, suction cup, and adhesive strips, all sold together in kits for $20 to $50.
  • Opening an iPhone voids any remaining manufacturer warranty, and puncturing the battery during removal can cause it to swell or catch fire.
  • iFixit and YouTube have step-by-step guides for most iPhone models, but the process differs between models and gets harder on newer phones with more adhesive.
  • If your iPhone is still under warranty or AppleCare+, battery replacement may be free if the battery health has dropped below 80 percent.

Apple's official battery replacement process

Apple replaces batteries at Apple Stores and through Apple's mail-in repair service. You can also go to an authorized Apple repair partner—Best Buy's Geek Squad, for example, or independent shops certified by Apple. To start, visit apple.com/support, select your device, choose "Battery and Charging," and then select "Battery Replacement Service." You can book an appointment at a nearby store or request a mail-in kit.

At an Apple Store, the process usually takes one to three hours if you wait, or you can drop it off and pick it up the next day. For mail-in service, Apple sends you a box, you pack the phone and ship it back, and Apple returns it within five to seven business days. The battery comes with a one-year warranty. If your phone is under AppleCare+ or still covered by the original warranty and the battery health is below 80 percent, the service is free.

What you need to do it yourself

A DIY battery replacement kit includes a pentalobe screwdriver (the five-pointed star shape used on iPhones), a plastic spudger or pry tool, a suction cup, tweezers, and adhesive strips to reseal the phone. Kits cost $20 to $50 on Amazon or eBay. You will also need a replacement battery specific to your iPhone model—search for "iPhone [your model] battery" to find the right part. Make sure the seller has good reviews and specifies that the battery is for your exact model.

Before you start, back up your phone to iCloud or a computer. Power it off completely. Work on a clean, flat surface with good lighting. Have a small container or magnetic mat nearby to hold the screws—they are tiny and straightforward to lose. iFixit has detailed photo guides for every iPhone model at ifixit.com; search for your model and "battery replacement." YouTube also has step-by-step videos, though quality varies by uploader.

The basic steps for opening and replacing the battery

The process differs slightly by model, but the general order is: remove the two pentalobe screws at the bottom of the phone, use the suction cup to lift the screen slightly, slide the spudger around the edge to separate the screen from the body, disconnect the battery connector inside (a small plug you pull straight out), remove the adhesive strips holding the battery, lift out the old battery, install the new one, reconnect the battery plug, and reseal the screen with new adhesive strips.

Newer iPhones (iPhone 12 and later) have much more adhesive holding the battery in place, making removal harder and slower. Older models like the iPhone 6 and 7 are easier. The whole job usually takes 30 minutes to an hour if you have done it before, or one to two hours if it is your first time. The most common mistakes are pulling the battery connector at an angle instead of straight out, which can break the connector, or puncturing the battery with a tool, which can cause it to swell or catch fire.

Risks of opening your iPhone yourself

Opening the phone voids any remaining manufacturer warranty. If something breaks during the repair—the screen cracks, the logic board gets damaged, water seals are broken—Apple will not cover it under warranty. You are responsible for the damage. The battery itself is the biggest hazard: lithium-ion batteries can swell, catch fire, or explode if punctured or bent. If you slip with a tool and puncture the battery, stop when ready and do not try to remove it. Let it cool and take the phone to a professional.

Water resistance also suffers. iPhones are sealed with adhesive and gaskets to keep water out. Once you open it, the seal is broken. Even if you use new adhesive strips, the phone is no longer water-resistant to the same degree. If you spill water on it later, the phone is more likely to suffer damage than it was before. This is a permanent trade-off of the DIY route.

Authorized repair shops as a middle ground

If you want a professional repair but do not want to wait for Apple or pay Apple's price, look for an authorized Apple repair partner in your area. These shops have been certified by Apple, use genuine or Apple-approved parts, and offer a warranty on their work. Best Buy's Geek Squad, for example, offers iPhone battery replacement for similar pricing to Apple and usually faster turnaround at busy locations.

Independent repair shops that are not Apple-certified are cheaper—often $30 to $60—but may use non-genuine batteries and offer no warranty. If something goes wrong, you have no recourse. Check reviews on Google or Yelp before choosing an independent shop. Ask whether they use genuine Apple batteries or third-party batteries, and whether they offer a warranty on the replacement.

What to do after the battery is replaced

After a new battery is installed, whether by you or a professional, charge it fully before using the phone heavily. The first charge cycle helps the phone calibrate the battery. Go back to Settings > Battery > Battery Health & Charging after a few days of normal use—the maximum capacity should show close to 100 percent. If it shows significantly lower, the battery may be defective and should be replaced again.

If you did the replacement yourself, monitor the phone for the next week for any signs of problems: unexpected shutdowns, overheating, the screen not responding, or water damage. If any of those happen, the phone may have been damaged during the repair. At that point, take it to Apple or a repair shop for diagnosis. Keep your receipt from the battery purchase in case you need to return a defective battery.

Frequently Asked Questions

Can I replace the battery on an iPhone 15 or newer?

Yes, but it is much harder than older models. iPhone 15 and later use more adhesive to hold the battery in place, making removal slow and risky. Most people find it easier to use Apple's service or an authorized repair shop for these models.

What if my iPhone is still under warranty?

If the battery health has dropped below 80 percent and your phone is still under the original one-year warranty, Apple replaces the battery for free. If you have AppleCare+, battery replacement is free regardless of capacity. Check your coverage at apple.com/support before paying.

Is a third-party battery as good as an Apple battery?

Third-party batteries work, but Apple batteries are designed and tested specifically for your model. Third-party batteries may not report accurate health data to the phone, may not last as long, or may not charge as efficiently. If you go the DIY route, look for batteries from reputable sellers with good reviews.

How long does a new battery last?

A new battery is designed to hold 80 percent capacity after 500 full charge cycles, which is roughly two to three years of normal daily use. After that, it will continue to degrade slowly. Most people replace the battery again after three to four years.

What happens if I puncture the battery during removal?

Stop when ready and do not try to remove it. A punctured lithium-ion battery can swell, catch fire, or explode. Let the phone cool in a safe place away from flammable materials, then take it to Apple or a repair shop. Do not try to use the phone or charge it.