I have a Apple Watch Series 5 GPS only thats been at 80% for months but the battery life is horrible. Getting worse. Once it drops below 80, I plan to take it to Apple for a battery replacement. Do they replace the battery or give me a refurbished unit?
US standard is $0 if you have AppleCare+ and $79 if you don’t, across the full range, but only as far back as the S2.
Add an extra $10 if you want the replacement shipped back to, it’s free to collect it at an Apple Store.