How to replace battery for Apple Watch Series 1
I need a replacement battery for my Apple Watch Series 1. Can I send this away to be replaced or shall I visit an Apple Store?
[Re-Titled by Moderator]
Apple Watch, watchOS 4
The Apple Watch Series 1 is considered obsolete by Apple.
Obtaining service for your Apple product after an expired warranty - Apple Support
I believe that means Apple will no longer service this Apple Watch.