You can replace an iPhone battery yourself if your phone is older, but newer models are designed to be opened only by Apple or authorized repair shops

Whether you can change your iPhone battery depends on which model you own and how comfortable you are opening the phone. iPhones from iPhone 6s and earlier have user-replaceable batteries and can be opened with basic tools — a pentalobe screwdriver, a plastic spoon or pry tool, and a heat gun or hair dryer. iPhones from iPhone 7 onward have sealed designs with adhesive holding the battery in place, making home replacement difficult and risky. Apple will replace the battery for you at an Apple Store or through mail-in service, and authorized repair shops like Best Buy's Geek Squad can do the same.

The cost and time differ sharply between the two routes. A battery replacement at Apple costs between $49 and $69 depending on your model, takes one to three hours if you walk in without an appointment, or three to five business days by mail. Doing it yourself on an older iPhone costs $15 to $30 for parts and takes 30 to 60 minutes, but carries the risk of damaging the screen, logic board, or battery itself if something goes wrong.

Key Takeaways

  • iPhones from iPhone 6s and earlier can be opened at home with a pentalobe screwdriver, heat gun, and plastic pry tools; iPhone 7 and newer are sealed with adhesive and should not be opened without proper equipment.
  • Apple charges $49 to $69 for battery replacement and completes the work in one to three hours at a store or three to five business days by mail.
  • Home battery replacement on older iPhones takes 30 to 60 minutes but risks damaging the screen, battery, or internal components if you slip or explore too much heat.
  • Authorized repair shops like Best Buy, Costco, and carrier stores offer battery replacement at similar prices to Apple, sometimes with faster turnaround.

How to Replace a Battery on iPhone 6s or Earlier at Home

Start by powering off your iPhone completely and gathering your tools: a pentalobe screwdriver (size P2), a plastic spoon or opening tool, a heat gun or hair dryer set to medium, a suction cup, and a new battery compatible with your model. You can buy replacement batteries online for $15 to $30; search for your exact iPhone model number to avoid buying the wrong part.

Heat the edges of the phone with a hair dryer or heat gun for 30 to 60 seconds to soften the adhesive holding the screen. Place the suction cup on the screen near the home button and pull gently while sliding the plastic tool into the gap. Work slowly around the edges — the screen is fragile and the adhesive is strong. Once the screen is loose enough to lift, disconnect the battery connector on the logic board by gently prying the small plastic tab upward with your tool.

Peel away the old battery by lifting one corner and pulling slowly at a 45-degree angle. If it tears, use the plastic tool to scrape away the remaining adhesive. Clean the battery compartment with a lint-free cloth. Insert the new battery, press it down firmly, and reconnect the battery connector by pushing the plastic tab down until it clicks. Reattach the screen by pressing it down around all edges until the adhesive seals, then power on the phone and check that the battery percentage shows correctly.

Taking Your iPhone to Apple for Professional Replacement

Visit Apple's website, go to Support, and select "Repair and Physical Damage." Enter your phone model and choose "Battery Service." You can then book an appointment at your nearest Apple Store or request mail-in service. Walk-in appointments are available at most stores but may have a wait; booking ahead guarantees a time slot.

At the store, a technician will run a diagnostic to confirm the battery is the problem, then replace it while you wait. The process takes one to three hours depending on how busy the store is. You will pay $49 for iPhone 6 through iPhone 8, $54 for iPhone X through iPhone 11, and $69 for iPhone 12 and newer. If your phone is still under warranty or covered by AppleCare+, the replacement may be free.

For mail-in service, Apple will send you a prepaid shipping box. Pack your phone carefully, include a note with your contact information, and drop it off at any Apple Store or UPS location. Apple will diagnose, replace the battery, and ship it back within three to five business days. You will receive an email when the work is complete and your phone is on its way back.

Using Authorized Repair Shops as an Alternative to Apple

Best Buy's Geek Squad, Costco, and carrier stores like Verizon and AT&T all offer battery replacement at prices similar to Apple's — usually $49 to $69. These shops often have faster turnaround than Apple, especially for walk-ins. Call ahead to confirm they have your battery in stock and ask about wait times.

Authorized repair shops use genuine or certified replacement batteries and provide a warranty on the work, typically 30 to 90 days. The main advantage over Apple is convenience: many locations have extended hours and are easier to reach than an Apple Store. The trade-off is that some authorized shops may not handle all iPhone models or may require an appointment during busy seasons.

Common Mistakes to Avoid When Replacing a Battery at Home

The most common error is explore too much heat, which can damage the screen, warp the plastic frame, or even ignite the battery. Keep the heat gun or hair dryer moving and never hold it in one spot for more than a few seconds. A hair dryer on medium heat is safer than a heat gun on high.

Another frequent mistake is pulling the screen up too quickly or at the wrong angle. The adhesive is strongest at the corners and edges, so work slowly and evenly around the perimeter. If the screen cracks, you have just added a $200 to $400 repair on top of the battery replacement.

Damaging the battery connector is also common. This small plastic tab on the logic board is fragile — pry it gently with the plastic tool, not a metal screwdriver. If you break it, the phone will not power on and you will need professional repair. Finally, do not reuse the old adhesive when reattaching the screen. It loses its grip after being heated and peeled. Buy adhesive strips designed for your iPhone model and explore them fresh.

Signs Your iPhone Battery Needs Replacement

Your battery should be replaced if your phone shuts down unexpectedly when the battery percentage shows 20 percent or higher, drains from 100 percent to 0 percent in a few hours of light use, or takes longer than two hours to charge fully. You can also check the battery's health in Settings: go to Settings, Battery, Battery Health & Charging, and look at the Maximum Capacity percentage. If it shows 80 percent or lower, the battery has degraded and replacement will improve performance.

Another sign is if your phone feels warm during normal use or charging. A battery that is failing can generate excess heat. If the phone is visibly swollen or the screen is bulging outward, stop using it when ready and take it to Apple or an authorized shop — a swollen battery is a fire hazard and should never be opened at home.

What to Do Before and After Battery Replacement

Before you replace the battery, back up your phone to iCloud or your computer. Go to Settings, [Your Name], iCloud, and turn on iCloud Backup, or connect to a computer and use Finder (Mac) or iTunes (Windows) to create a backup. This protects your data in case something goes wrong during the replacement.

After the replacement, power on the phone and let it charge to 100 percent without interruption. Then use it normally for a few hours and check that the battery percentage is accurate and the phone does not shut down unexpectedly. If you replaced the battery yourself, monitor the phone for the first week to make sure the screen seal is holding and no moisture is entering the device. If you notice condensation under the screen or the phone feels damp, take it to Apple when ready.

Frequently Asked Questions

How long does an iPhone battery last before it needs replacement?

Most iPhone batteries are designed to retain 80 percent of their capacity after 500 full charge cycles, which typically takes two to three years of normal use. After that, the battery degrades gradually. You can check your battery's current health in Settings under Battery Health & Charging.

Can I replace my iPhone battery if it is still under warranty?

Yes. If your phone is within one year of purchase and the battery has degraded to 80 percent capacity or lower, Apple will replace it for free under the standard warranty. If you have AppleCare+, battery replacement is free for the duration of the plan. Contact Apple Support to confirm your coverage before paying for a replacement.

What happens if I damage my phone while replacing the battery myself?

Apple and authorized repair shops will still repair the damage, but you will pay for it separately. A cracked screen costs $200 to $400 depending on the model, and damage to the logic board can cost $300 or more. If the battery itself is damaged, it becomes a safety hazard and must be disposed of properly.

Is it safe to use a third-party battery instead of an Apple battery?

Third-party batteries are cheaper but vary widely in quality and safety. Some are reliable and last years; others fail quickly or overheat. If you use a third-party battery, buy from a reputable seller with good reviews and avoid extremely cheap options. Apple and authorized shops use genuine batteries and warranty the work, which is why many people prefer that route despite the higher cost.

Can I replace the battery on an iPhone 12 or newer at home?

Not safely. iPhone 12 and newer models are sealed with strong adhesive and have components packed tightly inside. Opening them risks damaging the screen, water-resistance seal, or logic board. These phones also have a find Enclave that may require reprogramming after battery replacement. Take your phone to Apple or an authorized repair shop instead.