You can replace an iPhone battery yourself with a kit, take it to Apple, or visit a third-party repair shop — each route costs different amounts and takes different time

Apple designs iPhones so the battery is glued inside, not user-replaceable like older phones. You have three real options: pay Apple to do it in their stores or through mail-in service, buy a battery replacement kit and do it yourself, or take the phone to an independent repair shop. The cost ranges from about $70 at Apple to $20 to $40 for a kit you install yourself, though the DIY route requires patience and carries a small risk of damaging the phone if you slip with the tools.

Battery replacement makes sense when your iPhone shuts down at 20 percent charge, drains in a few hours of light use, or won't hold a charge overnight even after a restart. iPhones typically lose noticeable battery capacity after 500 full charge cycles — roughly two to three years of normal use. If your phone is still under warranty or you have AppleCare+, the cost may be covered or reduced.

Key Takeaways

  • Apple charges around $70 to $80 to replace an iPhone battery in-store, takes three to five business days by mail, and covers the work under warranty if your battery health is below 80 percent.
  • Third-party repair shops typically charge $40 to $60 and can often do the work same-day, but the repair voids any remaining Apple warranty.
  • DIY battery kits cost $20 to $40 and include the battery, adhesive strips, and tools, but require 30 to 60 minutes of careful work and risk cracking the screen or damaging internal components if you slip.
  • You can check your battery health by going to Settings > Battery > Battery Health & Charging to see the maximum capacity percentage before deciding whether replacement is worth it.

Checking your battery health before you replace it

iPhones show you exactly how much battery capacity you have left. Open Settings, tap Battery, then tap Battery Health & Charging. You will see "Maximum Capacity" as a percentage — 100 percent means the battery is new, 80 percent means it holds 80 percent of what it originally did, and anything below 80 percent is when Apple considers it degraded enough to replace under warranty.

If the percentage is above 85 percent and your phone still lasts a full day, replacement may not be necessary yet. If it is below 80 percent or your phone shuts down unexpectedly, replacement will noticeably improve how long the phone runs between charges. The health percentage only goes down over time — it will not improve on its own.

Apple's battery replacement service

Apple replaces batteries at their retail stores, through their mail-in service, or at authorized service providers like Best Buy's Geek Squad. In-store replacement usually takes three to five business days; you drop the phone off and pick it up later. Mail-in service takes about a week total — you ship the phone to Apple, they replace the battery, and they ship it back.

The cost is around $70 to $80 for most iPhone models, though older models like the iPhone 6 or 7 may cost slightly less. If your phone is under warranty or you have AppleCare+, the replacement is free if the battery health is below 80 percent. If you have AppleCare+ but the battery is above 80 percent, you pay a $29 service fee instead of the full price. Apple's service includes a new battery, reassembly, and a 90-day warranty on the repair itself.

Third-party repair shops

Independent phone repair shops in most towns and shopping centers offer battery replacement for $40 to $60, often while you wait. Many can complete the work in 30 minutes to an hour. These shops are faster and cheaper than Apple, but the repair voids any remaining Apple warranty on the phone — if something else breaks after the battery replacement, Apple will not cover it under warranty.

Quality varies between shops. Before you go, check Google reviews or Yelp for that specific location, and ask whether they use genuine Apple batteries or third-party batteries. Genuine batteries last longer and are less likely to cause problems, though they cost more. Some shops will show you the old battery and the new one side by side so you can see the work was actually done.

DIY battery replacement with a kit

Battery replacement kits for iPhones cost $20 to $40 on Amazon or eBay and include the battery, adhesive strips to hold it in place, and basic tools like a pentalobe screwdriver, plastic pry tools, and tweezers. You will also need a heat gun or hair dryer to soften the adhesive holding the old battery in. The process takes 30 to 60 minutes depending on how careful you are.

The basic steps are: heat the edges of the phone to soften the adhesive, carefully pry open the back panel or screen, disconnect the battery connector, peel out the old battery, clean the adhesive residue, install the new battery with fresh adhesive strips, and reassemble the phone. YouTube has detailed walkthroughs for your specific iPhone model — search "iPhone [your model] battery replacement" and watch the full video before you start.

The main risks are cracking the screen if you pry too hard, damaging the battery connector if you pull at the wrong angle, or getting adhesive on components you did not mean to touch. If anything goes wrong, you will need to pay a repair shop to fix it, which can cost more than just having Apple do it in the first place. This route only makes sense if you are comfortable with small, fiddly work and have watched the full video for your exact model.

What to expect after battery replacement

After replacement, your phone should run noticeably longer between charges — usually back to close to how it ran when new, depending on how old the phone is. The battery health percentage will reset to 100 percent in Settings. The first few charge cycles may feel slower as the phone and battery calibrate to each other; this is normal and goes away after three to five full charges.

If you used Apple's service or a reputable third-party shop, the new battery should last two to three years before capacity drops noticeably again. If you used a DIY kit with a third-party battery, it may degrade slightly faster. Either way, you have bought yourself another couple of years before the next replacement becomes necessary.

Frequently Asked Questions

How do I know if my iPhone battery needs replacing?

Check Settings > Battery > Battery Health & Charging. If Maximum Capacity is below 80 percent, or if your phone shuts down unexpectedly even when the battery percentage shows 20 or 30 percent, replacement will help. If the percentage is above 85 percent and the phone lasts a full day, you can wait.

Will replacing the battery myself void my warranty?

Yes. Opening the phone yourself voids any remaining Apple warranty. If something else breaks during or after the replacement, Apple will not cover it. Third-party repairs also void the warranty, though you get a warranty on the repair work itself from the shop.

Can I use a non-Apple battery in my iPhone?

Yes, but genuine Apple batteries are more reliable and last longer. Third-party batteries are cheaper but may degrade faster or cause unexpected shutdowns. Most reputable repair shops use genuine batteries; ask before you agree to the work.

How long does Apple's mail-in battery service take?

About one week total — a few days for shipping, one to two days for the actual replacement, and a few days to ship back. In-store service is faster, usually three to five business days from drop-off to pickup.

What if I drop my phone while replacing the battery myself?

If the screen cracks or internal components break, you will need to pay a repair shop to fix it. This can cost $150 to $300 depending on the damage, which is more than having Apple do the battery replacement in the first place. Work slowly, on a clean flat surface, and watch the full video for your model before you start.