Tough Solar
Encyclopedia

Tough Solar is the name given by Casio
Casio
is a multinational electronic devices manufacturing company founded in 1946, with its headquarters in Shibuya, Tokyo, Japan. Casio is best known for its electronic products, such as calculators, audio equipment, PDAs, cameras, musical instruments, and watches...

 to the solar power
Solar power
Solar energy, radiant light and heat from the sun, has been harnessed by humans since ancient times using a range of ever-evolving technologies. Solar radiation, along with secondary solar-powered resources such as wind and wave power, hydroelectricity and biomass, account for most of the available...

ed battery charging system used in its G-Shock
G-Shock
G-Shock is a brand of watches manufactured by Casio, known for its resistance to shocks . They were, and continue to be, designed primarily for sports, military, and outdoor adventure oriented activity; for example, practically all G-Shocks have some kind of stopwatch feature, countdown timer,...

 line of watch
Watch
A watch is a small timepiece, typically worn either on the wrist or attached on a chain and carried in a pocket, with wristwatches being the most common type of watch used today. They evolved in the 17th century from spring powered clocks, which appeared in the 15th century. The first watches were...

es.
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