Apple Watch Replacement battery

Hi

Apple Watch is not user-serviceable and batteries are not available to buy as spare parts.

The battery in Apple Watch is designed to retain up to 80% of its original capacity after 1,000 complete charge cycles:

Batteries - Service and Recycling - Apple

Apple's Limited Warranty (and AppleCare+, if previously purchased) includes coverage for defective batteries.

Chargeable, out-of-warranty battery service is also available, if required. Prices vary by country. In the US, for example, out-of-warranty battery service currently costs $79 plus tax and, if required, shipping:

Apple Watch Service Pricing - Apple Support

If you believe that your battery requires replacement, then I suggest that you contact Apple Support (remote diagnostics and/or mail-in service may be available, if required), make a Genius Bar reservation or visit an Apple Authorised Service Provider to establish whether battery service is required and, if so, to establish your available service options, timescales and any cost:

• US: Apple Watch Service Answer Center - Apple Support
• Elsewhere: Apple - Support

The short answer is yes.

Battery service

If your battery has a manufacturing defect and it's covered by the Apple Limited Warranty, AppleCare+, or consumer law, we'll service your Apple Watch at no additional cost.

Our warranty doesn’t cover batteries that wear down from normal use. We offer out-of-warranty battery service for a fee. If your Apple Watch battery holds 80 percent or less of its original battery capacity and it’s covered by AppleCare+, you might get Apple Watch battery service for no additional charge.

Take a look at this link, listed below for more information

Apple Watch Service Answer Center - Apple Support

Yes, you can replace the Apple Watch battery (through Apple) If you've considered getting an Apple Watch, you've probably wondered about what happens when that battery eventually runs dry. Surely Apple would have a way to keep your timepiece running for more than a couple of years, right? Yes, it does.