May 1st 2017
By Mike Flaminio
9 to 5 Mac relaying an Apple support bulletin:
Apple has extended its service coverage for Apple Watch (1st gen) models experiencing expanded/swollen battery problems to three years, covering customers for service for an additional two years beyond the complimentary 1-year Limited Warranty that it provides with the device.
The issue appears to be sporadic, but anything related to battery defects gets extra attention these days. The original Apple watch just turned two years old, so this coverage apparently gives current users up to 1 additional year of coverage for this issue.