The solar powered calculator has been ubiquitous for years, so much so you probably don’t even notice them and their photovoltaic cells anymore.
I hope this helped!
The most common use of photovoltaic cells now is in computing, and many solar cells are used in charging small electronics, like cell phones and iPods. You can find one of the most popular brands, Solio, at their website: http://www.solio.com/charger/
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