The Garmin fēnix 6 Solar Series fitness watch uses the sun’s energy to charge. When charging with solar power, it can receive up to 16 days of battery life, or you can use a regular charger for up to 14 days. This fitness watch comes with an array of features to monitor your health. For example, it offers hydration tracking. This sets reminders throughout the day to keep you drinking water. You’ll even see data on the estimated sweat loss after an activity. Also, the Garmin fēnix 6 Solar Series features animated workouts you can follow from the screen. Choose from preloaded workouts, including cardio, strength, yoga, and Pilates. Or download more sessions from the Garmin Connect online community. It’ll even track your heart rate during activities. In fact, the watch will alert you if your heart rate stays too high or low while you’re at rest.