Garmin Enduro

The Garmin Enduro uses Garmin's Power Glass lens, which incorporates a transparent solar panel to harvest energy from sunlight. The harvested solar power is used to extend the battery life significantly, allowing the watch to theoretically run indefinitely in smartwatch mode under ideal conditions. It does not replace standard USB charging but drastically reduces the frequency of it.

In standard GPS mode, the Enduro can track continuously for up to 70 hours on a single charge, or up to 80 hours if assisted by solar charging. If you switch to UltraTrac mode (which polls GPS less frequently), it can extend up to 300 hours. This makes it one of the most capable watches on the market for ultra-marathoners.

The Enduro features a large 51mm case, making it identical in physical size to the largest versions of the Garmin Fenix 6X Pro and Fenix 7X. However, the Enduro utilizes lightweight materials like a titanium bezel and a nylon strap to keep the weight down to just 61 grams. It is designed specifically to not weigh down endurance athletes.

While it has topographical maps and basic smart notifications, the Enduro lacks some of the advanced everyday health features of the Fenix line, specifically an internal ECG sensor or a microphone for voice commands. It also lacks music storage, purposefully stripping out features to save battery life and focus entirely on outdoor performance.