Which smartwatch has the longest battery life?

In this roundup, the Amazfit Bip 6 leads on paper with an advertised 14-day battery, though specialist-subreddit testers note that figure assumes light use and real-world life is closer to a week. The Garmin Forerunner 165 and Vivoactive 5 are rated for up to 11 days, while the Apple Watch Series 11 tops out at roughly 24 hours of normal use.