This makes sense. I have a Citizen watch whose whole watch face is covered by a transparent solar cell. The cell charges a capacitor which normally runs the watch. The watch battery is only for backup. Normal battery life is claimed 25 years.
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...because we spend more and more of our time outdoors holding phones over our heads, as opposed to staying indoors with our phones in our pockets?
This makes sense. I have a Citizen watch whose whole watch face is covered by a transparent solar cell. The cell charges a capacitor which normally runs the watch. The watch battery is only for backup. Normal battery life is claimed 25 years.
Even charges in indoor light.