You cannot replace an Apple Watch battery yourself — Apple does not sell batteries as consumer parts, and opening the watch voids the warranty
Apple Watch batteries are sealed inside the case and require specialized tools and training to access. If your watch no longer holds a charge, your only official option is to take it to Apple or an authorized service provider, who will replace the battery for a flat fee. The cost ranges depending on your watch model and whether it is still under warranty, but expect to pay between $70 and $100 for the service alone.
Third-party repair shops exist and may charge less, but they operate outside Apple's ecosystem and cannot may provide the water resistance or performance of your watch after opening it. If your watch is relatively new and the battery is failing prematurely, Apple may replace it at no cost under the one-year limited warranty.
Key Takeaways
- Apple Watch batteries cannot be replaced by the user because the case is sealed and no consumer replacement parts are sold.
- Apple or an authorized service provider will replace the battery for $70 to $100, depending on the model and warranty status.
- If your watch is under one year old and the battery is failing, Apple will replace it free under the limited warranty.
- Third-party repair shops can open the watch and replace the battery for less money, but they cannot restore the original water resistance rating.
- Battery degradation is normal — most Apple Watch batteries retain 80 percent capacity after two years of daily use.
What Apple charges for battery replacement
Apple's battery replacement service costs a flat fee that does not depend on the reason the battery failed. For most Apple Watch models, the service costs between $70 and $100. Series 9 and Ultra models may cost slightly more. You pay this fee even if the watch is out of warranty, unless the battery failure is covered under AppleCare+.
If you have AppleCare+ for your watch, battery replacement is covered at no cost as long as the coverage is active. AppleCare+ costs between $40 and $80 depending on the model and covers accidental damage, hardware failures, and battery service for two years from the date of purchase.
The replacement itself takes about one to two hours at an Apple Store if you have an appointment. Mail-in service through Apple's website takes five to seven business days. You can check the current price for your specific model by visiting Apple's support page and entering your watch model.
How to know if your battery needs replacement
Apple Watch batteries degrade over time. A battery that originally lasted 18 hours on a full charge may only last 12 hours after two years of daily use. This is normal and expected. You should consider replacement when the watch no longer makes it through a full day of typical use, or when you find yourself charging it multiple times per day.
Check your battery health in the Watch app on your iPhone. Open the Watch app, go to Battery, and look at the battery percentage. If the watch is showing 20 percent or lower after a full night of charging, the battery is likely degraded. You can also check battery health by going to Settings > General > About on the watch itself, though the iPhone app gives more detail.
If your watch is less than one year old and the battery is draining faster than normal, contact Apple before paying for replacement. Batteries that fail prematurely within the warranty period are replaced free of charge.
Why you cannot buy a replacement battery separately
Apple does not sell Apple Watch batteries to consumers or independent repair shops. The battery is glued to the internal frame and requires removal of the case back, which Apple considers a sealed component. This design choice prioritizes water resistance — the watch is rated water-resistant to 50 meters on most models, and opening the case risks breaking the seal that keeps water out.
If a third-party repair shop opens your watch and replaces the battery, they may not be able to restore the original water resistance rating. The adhesive used to seal the case back is specific to Apple's manufacturing process, and resealing it with standard adhesive does not may provide the same protection. This is why Apple's warranty explicitly voids if the watch has been opened by anyone other than an authorized technician.
Third-party repair options and their trade-offs
Independent repair shops in most cities can replace an Apple Watch battery for $30 to $60, which is less than Apple's fee. However, this savings comes with real risks. Once the case is opened, the water resistance rating cannot be may provide, even if the shop uses the correct adhesive. If your watch gets wet after a third-party repair, water damage is not covered by any warranty.
Some third-party shops are more careful than others. Before choosing one, ask whether they use original Apple batteries or third-party replacements, and whether they can reseal the case with the correct adhesive. Ask for references or reviews from other customers. Even with a reputable shop, understand that you are accepting the loss of the manufacturer's water resistance may provide.
If your watch is still under AppleCare+ or the one-year limited warranty, using a third-party repair shop will void that coverage. Apple will refuse to service the watch in the future if it has been opened by an unauthorized technician.
How long Apple Watch batteries typically last
Apple designs Apple Watch batteries to retain 80 percent of their original capacity after 1,000 complete charge cycles. In real-world use, this translates to roughly two years of daily charging before noticeable degradation occurs. Some users report their batteries lasting three years with lighter use, while others see faster degradation if they charge the watch multiple times per day or expose it to extreme temperatures.
Battery life also depends on which watch model you own. Older Series 3 and Series 4 models had smaller batteries and tend to degrade faster than newer Series 8 and Series 9 models. The Ultra model has a larger battery and typically lasts longer on a single charge, which can extend the time before replacement becomes necessary.
Charging habits affect battery longevity. Letting the battery drain completely before charging, or leaving it plugged in overnight every night, can accelerate degradation. Apple recommends charging your watch daily but not leaving it on the charger for extended periods when not in use.
Steps to take before paying for battery replacement
Before you schedule a battery replacement, try these troubleshooting steps to rule out software issues that might be draining the battery faster than normal. Restart your watch by holding the side button until you see the power-off slider, then slide to power off. Wait 10 seconds and turn it back on. This clears temporary glitches that sometimes cause excessive battery drain.
Check which apps are running in the background. Open the Watch app on your iPhone, go to General > Background App Refresh, and turn off background refresh for apps you do not use frequently. Apps like social media, news, and fitness trackers can drain the battery significantly if they are updating in the background.
Disable Bluetooth and Wi-Fi if you do not need them. Go to Settings > Bluetooth and Settings > Wi-Fi on your watch and turn them off. If the battery life improves noticeably, the issue may be a connectivity problem rather than a failing battery. If battery life does not improve after these steps, the battery itself is likely degraded and replacement is the next step.
Frequently Asked Questions
How much does Apple charge to replace an Apple Watch battery?
Apple charges between $70 and $100 for battery replacement depending on your watch model. The fee is the same whether the battery is under warranty or not. If you have AppleCare+, battery replacement is covered at no cost.
Will Apple replace my battery for free if it is still under warranty?
Yes, if your watch is less than one year old and the battery is failing, Apple will replace it free under the limited warranty. If the battery is degrading normally after one year, you will pay the standard service fee.
Can a third-party repair shop replace my Apple Watch battery?
Yes, but the watch will lose its water resistance may provide after being opened. Third-party shops typically charge $30 to $60, but using one voids any remaining AppleCare+ coverage and Apple will refuse to service the watch in the future.
How long does it take to get my battery replaced at Apple?
In-store replacement takes one to two hours with an appointment. Mail-in service takes five to seven business days. You can schedule an appointment through Apple's website or by calling your local Apple Store.
What should I do if my Apple Watch battery drains too fast?
First, restart the watch and check which apps are running in the background. Turn off background app refresh for apps you do not use, and disable Bluetooth and Wi-Fi if you do not need them. If battery life does not improve, the battery is likely degraded and needs replacement.