Garmin Enduro 3

Enjoy a 30 day battery life, solar charging, independent GPS tracking. Only model to not have an AMOLED display if you want brighter, sharper colors. Go with an Instinct 3 if you can live without the GPS. Go with a Fenix if you just love throwing money away or if you need a dive watch.

Only complaint (not about the watch) is that Garmin is like the Porsche of outdoor smartwatches: All their products sit at different price tiers and features are tied to specific models.