You can replace an Apple Watch battery, but Apple does it for you—you cannot do it yourself at home

Apple Watch batteries are sealed inside the case with adhesive, and opening one without the right tools will damage the screen, the case, and the battery itself. Apple's repair service removes the display, disconnects the battery safely, and installs a new one. Third-party repair shops can do this too, but Apple's service is the most reliable option if your watch is still under warranty or you want the repair documented.

The battery in an Apple Watch typically lasts about three years of normal use before it holds less charge than it did when new. If your watch drains from full to empty in a few hours, or won't turn on even after charging overnight, the battery is likely worn out and needs replacement.

Key Takeaways

  • Apple Watch batteries cannot be replaced by the user—the case is sealed with adhesive and requires professional tools to open safely.
  • Apple's mail-in repair service costs between $70 and $100 depending on the model, takes about one week, and includes a new battery and case seal.
  • Third-party repair shops can replace the battery for less money but may not honor your warranty and may use non-original parts.
  • If your watch is still under the one-year limited warranty and the battery is failing, Apple will replace it at no charge.
  • Before paying for a battery replacement, try a full reset and a full charge cycle to rule out a software problem.

How Apple's battery replacement service works

You start by visiting apple.com/support or calling Apple Support at 1-800-MY-APPLE. Tell them your watch model and describe the battery problem. They will either direct you to an Apple Store near you or set up a mail-in repair.

If you mail it in, Apple sends you a prepaid shipping label. You pack the watch in the box they provide, drop it at a UPS location or Apple Store, and it arrives at an Apple repair facility within two to three business days. The repair takes one to two business days once it arrives. You get the watch back with a new battery, a resealed case, and a receipt showing what was done. The whole process usually takes five to seven business days from the moment you ship it.

If you go to an Apple Store in person, the repair takes longer—usually three to five business days—because the store sends it to the same facility. However, you can sometimes drop it off and pick it up without an appointment if the store has capacity that day. Call ahead to ask.

What the repair costs

Apple charges $69 for battery replacement on most Apple Watch models (Series 3 through Series 9, Ultra, and Ultra 2). Some older models like the Series 1 and Series 2 cost $79. These prices do not include shipping if you mail it in, but Apple includes a prepaid label, so you pay nothing extra.

If your watch is still covered by the one-year limited warranty and the battery is failing due to a manufacturing defect—not physical damage—Apple replaces it free. If you have AppleCare+ (the extended coverage plan), battery replacement is also free as long as the plan is active. Check your coverage by going to Settings > General > About on your watch, or by signing into appleid.com and looking at your devices.

Third-party repair shops and what to watch for

Independent repair shops can replace an Apple Watch battery for $40 to $60, which is less than Apple charges. Some use original Apple parts; others use aftermarket batteries that may not last as long or hold charge as reliably. Before you choose a third-party shop, ask whether they use original or third-party batteries, and whether they can may provide the water resistance of the watch after repair.

One risk of third-party repair is that opening the case and resealing it can affect water resistance. Apple's process includes a pressure test and a new adhesive seal. A shop that does not pressure-test the watch after repair may leave it water-resistant only to a lower rating than it had before. If you swim or shower with your watch, this matters.

Another consideration: third-party repair voids any remaining Apple warranty. If something else fails in your watch within the next year, Apple will not cover it. For watches still under warranty, Apple's repair is the safer choice even if it costs more.

Before you pay for a replacement, try these steps

A watch that drains fast or won't turn on is not always a dead battery. Sometimes a software glitch or a stuck process is draining power. Try a full reset first: press and hold the side button until you see the power-off slider, then slide to power off. Wait 10 seconds, then press and hold the side button again until you see the Apple logo (usually 10 to 15 seconds). Let the watch restart completely.

After the restart, charge the watch to 100% using the magnetic charger that came with it. Leave it plugged in for at least two hours even after it shows full. Then use it normally for a full day and see whether the battery drains at the same rate as before. If the watch now lasts a normal day on a charge, the problem was software, not the battery.

If the watch still drains in a few hours or won't turn on, the battery is likely the issue and replacement is the next step.

What happens to your data during battery replacement

Apple's repair process does not erase your watch data. The watch is repaired and returned to you with all your activity history, apps, and settings intact. However, you should back up your watch before sending it in, just in case. To back up, open the Watch app on your iPhone, go to General > Reset, and tap "Erase Apple Watch Content and Settings." This creates a backup that your iPhone stores automatically. When your repaired watch arrives, you can restore from that backup.

If you use a third-party repair shop, ask whether they back up your data before opening the watch. Some do; some do not. If they do not, you should back up yourself before dropping it off.

How long an Apple Watch battery lasts and when to expect replacement

Apple rates the battery in a typical Apple Watch to hold at least 80% of its original capacity after 1,000 full charge cycles. In real use, that usually means two and a half to three years before the battery noticeably degrades. If you charge your watch every night (which is typical), you will hit 1,000 cycles in about three years.

Some users see the battery fail sooner if they charge the watch multiple times a day, leave it plugged in constantly, or expose it to extreme heat. Others get four or five years if they charge it less frequently or keep it in a cool environment. There is no way to predict exactly when your battery will need replacement, but if your watch is older than three years and the battery drains faster than it used to, replacement is a reasonable next step.

Frequently Asked Questions

Can I replace the battery myself with a kit from Amazon or eBay?

You can buy battery replacement kits online, but opening an Apple Watch yourself is risky. The case is sealed with strong adhesive, and prying it open often cracks the screen or damages the case permanently. Even if you succeed, resealing it properly requires a heat press and adhesive designed for watches. Most people who try this end up with a broken watch and still need to pay for professional repair.

How do I know if my battery is bad or if something else is wrong?

A failing battery usually shows one of three signs: the watch drains from full to empty in a few hours, it shuts off at 20% or 30% charge even though it shows a higher percentage, or it won't turn on at all. If the watch turns on, charges normally, and lasts a full day, the battery is probably fine. Try the reset steps described above first to rule out a software problem.

Will Apple replace my battery if the watch has a cracked screen?

Yes, but you will pay for both repairs. Apple charges separately for screen replacement (usually $229 to $299 depending on the model) and battery replacement ($69). If both need repair, the total cost can be high enough that some people choose to replace the watch instead. Ask Apple for a quote on both repairs before you decide.

Can I use my Apple Watch while it is being repaired?

No, the watch is in the repair facility during the process. If you need a watch during that week, you can borrow one, use your iPhone for notifications, or wait until the repair is done. Apple does not provide a loaner watch during mail-in repair.

What if the battery fails again after Apple replaces it?

If the replacement battery fails within 90 days, contact Apple and describe the problem. They will usually replace it again at no charge under the repair warranty. If it fails after 90 days, you pay for another replacement. The new battery comes with its own 90-day warranty.