You can't physically move a battery between iPhones, but you can transfer the data and settings that drain it

iPhone batteries are built into the phone and not designed to be swapped between devices. Apple glues them in place, and opening an iPhone to remove the battery voids your warranty and risks damaging the phone. If you're trying to move your information to a new iPhone, you transfer your data, apps, and settings instead — which is what most people actually need to do.

If your current iPhone's battery is failing and you want to keep using that phone, you can have Apple or an authorized repair shop replace the battery inside it. If you're moving to a different iPhone entirely, you'll set up the new phone and restore your data to it, leaving the old phone behind.

Key Takeaways

  • iPhone batteries cannot be removed and transferred; they are permanently installed and require professional replacement if they fail.
  • To move your data to a new iPhone, use iCloud backup or direct transfer through Setup Assistant, which copies everything including apps, photos, and settings.
  • If your current iPhone's battery is draining too fast, Apple can replace it for a fee, or you can continue using the phone with reduced performance.
  • A battery replacement at an Apple Store or authorized repair shop typically costs between $50 and $100 depending on your iPhone model.

Why iPhone batteries are not removable

Apple permanently adheres the battery to the inside of every iPhone. This design choice saves space, makes the phone thinner, and protects the battery from damage. It also means you cannot open the phone yourself without specialized tools and risking permanent damage to the display, logic board, and other components.

Attempting to remove the battery yourself will almost certainly break your phone. Even if you succeed in removing it, you cannot simply install it in another iPhone — each battery is calibrated to that specific phone's hardware, and swapping batteries between devices causes charging problems and inaccurate battery percentage readings.

How to transfer your data to a new iPhone

If you're moving to a different iPhone, the Setup Assistant walks you through copying everything from your old phone. Turn on your new iPhone and hold it near your old one during setup. Your new phone will detect the old one and ask if you want to transfer data. Choose "Transfer from iPhone," and the setup process will copy your apps, photos, messages, contacts, and settings.

This direct transfer method is the fastest way to move everything. It takes 30 minutes to a few hours depending on how much data you have and your Wi-Fi speed. You'll need both phones, both charged, and both on the same Wi-Fi network.

If you don't have both phones available at the same time, use iCloud instead. On your old iPhone, go to Settings > [Your Name] > iCloud and turn on iCloud Backup. Tap "Back Up Now" and wait for the backup to complete. Then on your new iPhone during setup, choose "Restore from iCloud Backup" and sign in with your Apple ID. Select the backup you just created, and your new phone will download all your data.

What to do if your iPhone battery is failing

If your battery drains quickly or won't hold a charge, you have two options: replace the battery or replace the phone. To check your battery's health, go to Settings > Battery > Battery Health & Charging. If the "Maximum Capacity" is below 80%, the battery is degraded.

An Apple Store or authorized repair shop can replace your battery. The cost varies by model — older iPhones cost less than newer ones — but typically ranges from $50 to $100. You can make an appointment at apple.com/support or call your local Apple Store. The repair usually takes a few hours, and you'll keep all your data and settings.

If your iPhone is very old or the repair cost is close to the price of a new phone, buying a new iPhone and transferring your data may make more sense. Compare the battery replacement cost to the price of the model you're considering before deciding.

How to extend battery life while you wait for a repair

If you're waiting for a battery replacement appointment, you can reduce how fast your battery drains. Go to Settings > Battery > Low Power Mode and turn it on. This slows down your phone's performance but extends battery life by several hours. You can also turn off background app refresh, reduce screen brightness, and close apps you're not using.

Disable location services for apps that don't need it: go to Settings > Privacy > Location Services and turn it off for individual apps. Turn off Bluetooth and Wi-Fi when you're not using them. These changes are temporary — you can turn them back on after your battery is replaced.

Third-party battery replacement services

Some phone repair shops that are not Apple-authorized offer battery replacements for less money than Apple charges. These shops can be faster and cheaper, but the repair may not include a warranty, and using non-Apple parts can affect your phone's performance or cause problems later.

If you choose a third-party repair shop, ask whether they use genuine Apple batteries or third-party batteries, what warranty they offer on the repair, and whether the repair will affect your AppleCare+ coverage if you have it. Some third-party repairs can void remaining AppleCare+ protection.

Frequently Asked Questions

Can I buy a replacement battery and install it myself?

No. iPhone batteries are glued in place and require specialized tools to remove safely. Attempting this yourself will almost certainly damage your phone permanently. Apple and authorized repair shops have the proper equipment and training to do this without breaking your device.

Will transferring my data to a new iPhone transfer the battery problem?

No. Battery health is tied to the physical battery inside the phone, not to your data or settings. When you transfer to a new iPhone, you get a new battery with full capacity. Your data moves, but the battery problem stays with the old phone.

What happens if I ignore a failing battery and keep using my iPhone?

Your phone will shut down unexpectedly when the battery can't hold enough charge, even if the percentage shows 20% or higher. Over time, the battery will hold less and less charge. The phone will still work, but you'll need to charge it multiple times a day. Replacing the battery restores normal performance.

How long does a battery replacement take at Apple?

If you have an appointment, most replacements take two to three hours. Without an appointment, you may wait longer depending on how busy the store is. Some Apple Stores offer same-day service if you drop off your phone early in the morning, but this varies by location.

Does AppleCare+ cover battery replacement?

AppleCare+ covers battery replacement if the battery capacity drops below 50%. If your battery is between 50% and 80% capacity, you'll pay the standard replacement fee. Check your AppleCare+ coverage at apple.com/support to see what's included.