The Garmin vívoactive 5 monitors your energy levels
Amazon.com: Garmin vívoactive 5, Health and Fitness GPS Smartwatch, AMOLED Display, Up to 11 Days of Battery, Black : Electronics
Garmin Vivoactive 5 Health and Fitness GPS Smartwatch, 1.2 in AMOLED Display, Up to 11 Days of Battery, Metallic Navy Aluminum Bezel with Navy Case and Silicone Band with Wearable4U Power Bank
Garmin Vivoactive 5 Review: The Fitness Smartwatch Gets Better Again | Tom's Guide