Your two routes: Apple or an independent repair shop

You can replace an iPhone 12 battery through Apple directly, or through an independent repair shop. Apple charges a flat fee and handles the work in-store or by mail. Independent shops are often cheaper and faster, but quality varies widely — some use genuine parts, others use refurbished or third-party batteries that may not last as long.

The choice comes down to cost, speed, and whether you want the certainty of Apple's warranty on the repair. If your phone is still under AppleCare+, the battery replacement is covered at no cost. If not, you will pay out of pocket either way.

Key Takeaways

  • Apple charges $69 for an out-of-warranty iPhone 12 battery replacement and typically completes it within a few days at an Apple Store or by mail.
  • Independent repair shops usually charge $30 to $50 and can often finish the same day, but the battery quality depends on the shop's sourcing.
  • AppleCare+ covers battery replacement at no cost if your phone is enrolled and the battery health has dropped below 80 percent.
  • You cannot safely replace an iPhone 12 battery yourself without specialized tools — the screen must be removed first, and the battery is glued in place.
  • Bring your phone to the appointment with your Apple ID password ready, since the repair process requires you to sign out of Find My iPhone.

Apple's battery replacement process and cost

Apple charges $69 for an out-of-warranty iPhone 12 battery replacement. If you have AppleCare+, the replacement is free as long as the battery health has fallen below 80 percent — you can check this in Settings > Battery > Battery Health & Charging. Apple will run a diagnostic to confirm the battery is genuinely degraded before proceeding.

You can start the process through apple.com, the Apple Support app, or by visiting an Apple Store in person. If you use the online route, Apple will either mail you a prepaid shipping box or direct you to a nearby store. Mail-in repairs typically take five to seven business days from the moment Apple receives your phone. In-store repairs are usually done within a few hours to a day, depending on how busy the location is.

Before you hand over your phone, Apple will ask you to sign out of Find My iPhone and remove any screen protectors or cases. Bring your Apple ID password with you — you will need it to complete the sign-out step.

Independent repair shops: speed and cost trade-offs

Independent repair shops advertise battery replacements for $30 to $50, often with same-day turnaround. The lower price reflects lower overhead than Apple, not lower quality — but quality depends entirely on where the shop sources its batteries. Some use genuine Apple parts salvaged from broken phones. Others use refurbished batteries from third-party suppliers, which may have shorter lifespans or inconsistent performance.

Before you choose a shop, ask directly whether the battery is genuine, refurbished, or third-party. Ask whether they offer a warranty on the replacement — reputable shops typically may provide the battery for six months to a year. Check online reviews on Google Maps or Yelp, and look for mentions of battery longevity in the comments.

The main risk is that a cheap battery may degrade faster than Apple's, meaning you could be back in a year instead of two or three. If you plan to keep the phone for several more years, the $20 difference between a cheap shop and Apple may not be worth it.

What happens during the replacement

The technician will remove your iPhone 12's screen by heating the edges and carefully prying it up — the screen is glued on and cannot be opened without heat. Once the screen is off, they disconnect the battery connector and peel away the adhesive strips holding the battery in place. A new battery is then glued in, the connector is reattached, and the screen is resealed with new adhesive.

The entire process takes 30 minutes to an hour at a repair shop, longer at Apple if they are busy. You will not be able to use your phone during the repair. Some shops offer a loaner device; Apple does not, though you can request a callback when your phone is ready.

After the repair, the technician will power on the phone, run a quick test, and show you the new battery health reading in Settings. At Apple, this will show 100 percent. At an independent shop, it may show slightly lower depending on the battery's age or previous use.

Checking your battery health before you go

Open Settings, tap Battery, then Battery Health & Charging. The number shown under Maximum Capacity is your current battery health. At 80 percent or above, your battery is still within normal range. Below 80 percent, it is degraded and a replacement will noticeably improve performance and standby time.

If your health is above 80 percent but your phone drains quickly, the problem may not be the battery — it could be a rogue app, background activity, or a software issue. Try restarting the phone and checking which apps are using the most battery in Settings > Battery > Battery Usage. If the problem persists after a restart, then a battery replacement is likely the right fix.

Write down your battery health percentage before you go to the repair shop. This gives you a baseline to compare against after the repair is done.

Preparing your phone for the appointment

Back up your data through iCloud or a computer before the repair. While a battery replacement should not affect your data, backups protect you in case something goes wrong. Go to Settings > [Your Name] > iCloud > iCloud Backup and tap Back Up Now, or connect to a computer and use Finder (Mac) or iTunes (Windows).

Sign out of Find My iPhone before you arrive. Go to Settings > [Your Name] > Find My > Find My iPhone and toggle it off. You will need your Apple ID password to do this. The repair shop or Apple will ask you to do this anyway, but signing out beforehand speeds up the process.

Remove any screen protectors, cases, or tempered glass. These will be damaged during the screen removal and are not worth saving. Bring your phone, your Apple ID password, and your ID if you are visiting a store in person.

Warranty and what to expect after the repair

Apple's battery replacement comes with a 90-day limited warranty covering defects in the battery or the repair work itself. If the battery fails within 90 days, Apple will replace it again at no cost. Independent shops typically offer a six-month to one-year warranty, though this varies — confirm the terms before you pay.

After the repair, your battery health will read 100 percent if a genuine new battery was installed. It will begin to degrade naturally over time — expect it to drop to 80 percent after two to three years of normal use. If it drops much faster than that, the battery may be defective, and you can return to the shop or Apple under warranty.

Your phone may feel warm for the first few hours after the repair as the adhesive cures. This is normal. If it remains hot after a day, or if the battery drains unusually fast, contact the repair shop or Apple when ready.

Frequently Asked Questions

Can I replace the battery myself?

Not safely. The iPhone 12 screen is glued on and requires heat tools to remove without cracking it. The battery is also glued in place and connected to the logic board. A single slip can damage the screen, the battery connector, or the phone's internal components. The specialized tools cost $100 to $200, and mistakes are expensive.

How long does a new iPhone 12 battery last?

A genuine battery typically reaches 80 percent health after two to three years of normal use. This depends on how often you charge it, the temperatures you expose it to, and how heavily you use the phone. Refurbished or third-party batteries may degrade faster, sometimes reaching 80 percent in 12 to 18 months.

Will the repair void my warranty?

No. A battery replacement from Apple or an authorized repair shop does not void your phone's warranty. If you use an unauthorized shop, Apple may refuse to service other issues later, but they cannot refuse to repair unrelated problems. Check your shop's authorization status on Apple's website before you go.

What if my phone is still under warranty?

If your iPhone 12 is within one year of purchase and the battery has degraded naturally, Apple will replace it free under the standard one-year warranty. If you have AppleCare+, battery replacements are free for the duration of the plan as long as the health is below 80 percent. Bring your receipt or proof of purchase to confirm the warranty status.

Is a mail-in repair safer than in-store?

Both are equally safe. Apple's mail-in process includes insurance, and the phone is handled by trained technicians in a controlled environment. In-store repairs are faster but carry no additional risk. Choose based on convenience — if you need your phone quickly, go in-store; if you can wait a week, mail-in is fine.