What is Power Glass or Sapphire Solar Charging?

Garmin® solar watches use either Power Glass™ or Power Sapphire™ watch lenses to convert sunlight into battery power, extending your time between charges.

The solar charging is not designed to be used as the primary charging source. The solar intensity will be displayed on the solar watch face or Solar Intensity widget as an icon that fills in as solar intensity is increased. This represents the amount of sunlight, or lux conditions, received.

When the watch is in full direct sunlight with a solar intensity of 100%, it is receiving approximately 50k lux or more. Additionally, a line graph will be visible on both the widget, and some watch faces, displaying solar intensity over the last 6 hours.

To learn more about solar charging, see - Getting the Most Out of Solar Charging With a Solar Capable Device.