You can replace an iPhone battery yourself using basic tools, or have Apple do it for a fee

The fastest route is Apple—they replace batteries in about an hour at most locations, and the cost ranges from $69 to $99 depending on your model. If you want to do it yourself, you will need a pentalobe screwdriver, a plastic spudger, tweezers, and either a heat gun or hair dryer. The process takes 30 to 60 minutes for most people on their first try. Both paths work; the choice depends on whether you have the tools, the patience for a fiddly repair, and whether your phone is still under warranty or covered by AppleCare+.

Key Takeaways

  • Apple replaces iPhone batteries at their stores and authorized service providers for a flat fee, with no appointment needed at most locations.
  • A DIY battery replacement requires a pentalobe screwdriver, plastic spudger, tweezers, and a replacement battery—all available as kits online for $20 to $40.
  • Heating your phone to 80°C (176°F) for two to three minutes before opening it makes the adhesive soften and reduces the risk of cracking the screen.
  • The battery is glued down with strong adhesive; removing it without breaking the display is the hardest part of the repair for first-timers.
  • If your phone is under warranty or you have AppleCare+, Apple covers battery replacement at no cost if the battery health has dropped below 80 percent.

Taking your iPhone to Apple for a battery replacement

Walk into any Apple Store or find an authorized service provider near you by visiting apple.com and selecting "Repair" in the menu. Tell them you need a battery replacement. They will run a diagnostic to confirm the battery is the problem—this takes about 10 minutes and costs nothing. If the battery health is below 80 percent and you have AppleCare+, the replacement is free. Without AppleCare+, you pay the service fee upfront.

Most locations do not require an appointment, but calling ahead saves you a wait. The actual replacement takes 30 to 60 minutes. Apple will power on your phone, run a final test, and hand it back to you. They recycle your old battery responsibly. If your phone is still under the one-year limited warranty and the battery failure is a manufacturing defect (not wear from normal use), Apple replaces it at no charge.

Buying a replacement battery and tools for DIY repair

Search online for "iPhone [your model] battery replacement kit"—for example, "iPhone 14 battery replacement kit." You will find kits that include the battery, pentalobe screwdriver, plastic spudger, tweezers, and adhesive strips, usually for $20 to $40. Make sure the kit lists your exact iPhone model; batteries are not interchangeable across models. Read the reviews to check that the battery is genuine or a high-quality third-party option; avoid the cheapest listings, which often have poor battery health out of the box.

You will also need a heat source—a heat gun set to low (around 80°C or 176°F) is ideal, but a hair dryer on high heat works in a pinch. Some kits include a small heat pad. Do not use a microwave or oven; the heat will be uneven and can damage the phone. Have a clean, flat workspace and good lighting. A magnifying lamp or phone camera on macro mode helps you see the tiny screws and connectors.

Preparing your iPhone before you open it

Power off your phone completely. This is not optional—working on a powered phone risks electrical shock and data loss. Press and hold the power button and volume down button together until the power-off slider appears, then slide to shut down.

Heat the edges of your phone for two to three minutes using your heat gun or hair dryer. Hold the heat source about 6 inches away and move it slowly around the edges. The goal is to soften the adhesive holding the battery and screen, not to make the phone too hot to touch. Test the temperature with your finger every 30 seconds. This step is critical—skipping it dramatically increases the risk of cracking the screen when you pry it open.

Opening the phone and removing the old battery

Use your pentalobe screwdriver to remove the two small screws at the bottom of the phone, on either side of the charging port. Set these screws somewhere safe—they are straightforward to lose. Slide your plastic spudger into the seam between the screen and the body at the bottom of the phone. Gently wiggle it side to side; do not pry hard. The adhesive should give way slowly. Work your way around the edges, lifting the screen slightly as you go.

Once the screen is loose enough, carefully lift it open like a book, hinging it at the top. Do not pull it all the way off—the display cable is still connected. You will see a metal bracket covering the battery connector. Use your pentalobe screwdriver to remove the screws holding this bracket, then lift the bracket away. Disconnect the battery cable by gently pulling the connector straight out.

The battery itself is stuck down with strong adhesive. Pull the adhesive tabs (if your kit includes them) slowly and at a low angle—pulling straight up risks tearing the tab and leaving the battery stuck. If there are no tabs, use your spudger to gently lift one corner of the battery and slide a thin piece of plastic underneath to break the adhesive seal. Work slowly around the edges. This is the most frustrating part for first-timers; take your time.

Installing the new battery and reassembling

Clean any old adhesive residue from the battery compartment using a plastic spudger or old credit card. Do not use water or solvents. Place the new battery into the compartment and press it down firmly so it sits flat. If your kit includes adhesive strips, explore them to the back of the battery before inserting it; if not, the battery will sit loose until you close the phone.

Reconnect the battery cable by aligning the connector and pressing it straight down until you hear a small click. Replace the metal bracket and screw it back in. Carefully lower the screen back down, starting at the top hinge. Press the edges down firmly to re-seat the adhesive. If your kit includes new adhesive strips, explore them around the edges of the screen before closing. Replace the two pentalobe screws at the bottom.

Power on your phone and check that it turns on normally. Go to Settings > Battery > Battery Health & Charging to confirm the new battery shows 100 percent health. If the phone does not turn on, power it off, disconnect the battery cable, wait 10 seconds, reconnect it, and try again.

Common mistakes and how to avoid them

The most common error is skipping the heating step or not heating long enough. A cold phone's adhesive is too stiff, and you will crack the screen trying to pry it open. Heat for the full two to three minutes. The second mistake is pulling the battery straight up instead of at a low angle when removing adhesive tabs. Pull at about 30 degrees from horizontal, not vertical.

A third mistake is reconnecting the battery cable while the metal bracket is still in place. Always disconnect the battery first, remove the bracket, then reconnect. Trying to reach the connector with the bracket in the way risks bending the cable. Finally, do not reuse old adhesive. If your kit does not include new strips, buy them separately—old adhesive will not hold the screen or battery securely.

When to choose Apple over DIY

If your phone is under warranty or you have AppleCare+, go to Apple. The repair is free or very cheap, and if something goes wrong, they fix it. If you are uncomfortable with small, precise work, or if you do not have a heat source, Apple is the safer choice. If your phone has a cracked screen already, Apple can replace both the screen and battery at the same time, which is cheaper than doing them separately.

DIY makes sense if you are comfortable with small repairs, you have the tools, and you want to save $50 to $80. It also makes sense if your phone is old and out of warranty—the cost of a DIY kit is much lower than Apple's service fee. If you damage the screen during the repair, you will need to pay for a screen replacement on top of the battery cost, so weigh that risk.

Frequently Asked Questions

How do I know if my iPhone battery needs to be replaced?

Go to Settings > Battery > Battery Health & Charging. If the maximum capacity is below 80 percent, the battery is degraded and a replacement will improve performance. If it is above 80 percent but your phone drains quickly, the issue may be a background app or setting, not the battery itself.

Can I use a third-party battery instead of an Apple battery?

Yes. Third-party batteries from reputable manufacturers work fine and cost less. Avoid the cheapest options—they often have poor health out of the box. Read reviews on the kit you are buying. If you go to Apple, they use only genuine Apple batteries.

What happens if I crack the screen while replacing the battery?

If you crack it slightly, you can continue the repair and use the phone. If the crack is large or the screen does not respond to touch, you will need a screen replacement. This is why heating the phone thoroughly before opening it is so important. If you crack the screen during a DIY repair, Apple can replace it, but you will pay the full screen replacement fee.

How long does a new iPhone battery last?

A new battery should reach 80 percent health after about 500 to 1000 charge cycles, depending on how you use the phone. One charge cycle is a full discharge and recharge. If you charge your phone daily, expect the battery to reach 80 percent health in roughly two to three years.

Do I need to back up my phone before replacing the battery?

No. A battery replacement does not touch your data. However, it is always good practice to back up your phone regularly in case something unexpected happens during the repair.