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iPhone not holding charge? How to replace an iPhone battery

When smartphones were in their infancy, battery packs were easy to replace. Most products let users open a flap on the back of the device to easily remove the battery, giving them a quick way to ditch a dead battery and install a new one. Fast forward to 2024, and that’s a rarity. Replacing batteries is much more difficult today than it was a decade ago, and that’s especially true for all iPhone models.

Whether you’re working with the new iPhone 15 or an old iPhone 12, you can’t just run out to the store and snag a new battery for your smartphone. Instead, you’ll need to contact Apple directly or go through elaborate workarounds to install the battery yourself.

Unsure which process is the best for you? Here’s a look at how to replace an iPhone battery, with steps that work for a wide range of models, including the iPhone 15 Pro Max, iPhone 14, and iPhone X.

How batteries work

Before you make any decisions, you should understand what happens to your iPhone battery over time. Lithium-ion (Li-ion) batteries, the type the iPhone uses, are considered consumables because they are known to degrade over time. It’s not a quality issue, it’s just the way they operate. Battery age is measured in battery cycles: One cycle equals draining the battery to 0% and completely recharging the battery to 100% one single time. This can take any amount of time since you will not drain your battery to 0% and back up to 100% every single day. It may take a day, two days, or even longer more to complete a battery cycle.

The iPhone packs an estimated 500 battery cycles before it starts to degrade, meaning if you own your phone for two or more years, you will have charged enough battery cycles to degrade the battery to just 80% of its full capacity. When the amount of charge the battery can hold diminishes, you’ll find your battery drains faster and must be recharged more often.

Battery age is not only dependent on time, but also on how you use your phone and the effect your use has on battery lifespan. As batteries degrade, it is reflected in your phone’s performance and the ability of the phone to access enough juice to do the things you want. With iOS 11 or later, you can check the general life of your battery under Settings > Battery > Battery Health > Maximum Capacity. You can also check charge levels for the last couple of days and even the percentage of time you spend on each app on your phone. This will help you decide whether or not to invest in a new battery.

Replacing the battery via Apple

Trevor Mogg / DT

The most convenient and reliable way to replace your iPhone’s battery is to do it straight through Apple. Simply swap out your old battery for a brand new one. For an iPhone 15, this costs $99. For iPhone X, XS, XS Max, XR, 11 Pro, 11 Pro Max, iPhone 12, 12 Pro, and 12 Mini, the cost is $69 for an out-of-warranty model not covered by AppleCare+. For an iPhone SE, 6, 6 Plus, 6S, 6S Plus, 7, 7 Plus, 8, 8 Plus, and all other eligible models, the out-of-warranty price is $49. Phones still under warranty or covered by AppleCare+ get free battery replacements. We recommend going the Apple route, as you won’t void your device’s warranty or risk damaging your iPhone by replacing the battery any other way. This also ensures that you receive a true Apple battery and not an after-market alternative.

Another easy way to start the process is to head to the nearest Apple Store, which could either take one visit or a few days. Best Buy is now also an authorized Apple repair provider, so if there are no Apple Stores nearby, Best Buy is a good alternate option. With the addition of Best Buy, eight out of 10 Apple customers live within 20 minutes of an Apple-authorized service provider.

If you’re in a more remote area where there are no authorized repair centers, you can always ship your iPhone to Apple for the battery swap, but the process will take quite a bit longer, as you’ll need to wait for Apple to send you a box to ship your iPhone in, send it, have Apple replace the battery, then ship it back to you.

Tip: You can make an appointment at your local Apple Store ahead of time through the Apple Store app on your iPhone or iPad, as well as on the Genius Bar website.

Replacing the battery yourself

It is possible to replace the iPhone battery yourself, but it’s not for the faint of heart. You should know iPhones use strong glue, and there are different parts you will have to remove to access the battery. It’s time-consuming, there is a risk of damaging your phone in the process, and you will absolutely void any warranties remaining on your iPhone. Doing it yourself will also affect the integrity of the waterproof capabilities that Apple added, starting with the iPhone 7 and iPhone 7 Plus.

You can find in-depth instructions, as well as kits with necessary tools for replacing your iPhone’s battery, at websites like iFixit. Replacement kits are available for around $35. It’s chapter than shipping your phone to Apple for a battery replacement, but the kits’ success isn’t guaranteed, and you’ll need to buy a new phone if you damage yours in the process. iFixit offers guides for iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone 12, iPhone 12 mini, iPhone 13, iPhone 13 Pro, iPhone Pro Max, iPhone 13 Mini, iPhone 14, iPhone 14 Plus, iPhone 14 Pro, iPhone 14 Pro Max, iPhone 15, iPhone 15 Plus, iPhone 15 Pro, iPhone 15 Pro Max, as well as many older models.

Getting your battery replaced at a third-party repair shop

Taking your iPhone to a third-party repair shop can be a great solution but should be approached cautiously. These shops typically offer quality repairs at a much lower cost than Apple’s, but you’ll have less guarantee of the outcomes and warranties. Since a repair shop is more of an unknown, be sure to look into ratings and reviews. You’ll usually get a good deal since they need your business, but it will likely be outside of a warranty. Overall, you won’t have the same level of quality guarantee as you do with Apple.

Bottom line

If your iPhone is a newer model, the battery that came with it should function well for a few years unless it’s defective. With iOS 11 and up, you can even check out your battery’s health and troubleshoot from your basic Settings by examining the battery’s specific health. Apple provides reasonable prices for replacement batteries to extend your device’s life, even for some of its older models.

If you feel confident and know what you’re doing, a third-party vendor or repair shop will likely be a cheaper way to go, though you’ll forfeit Apple’s warranty in many cases. However, we recommend starting with the professionals at Apple or Best Buy to get quality work and keep your warranty. As you research options for replacing your battery, you may also want to read our guide on saving smartphone battery life.

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Jackie Dove
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Jackie is an obsessive, insomniac tech writer and editor in northern California. A wildlife advocate, cat fan, and photo app…
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