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Citizen Watch Co., ... so it does not require replacement batteries. ... Q&Q SmileSolar is a line of solar powered watches, which do not require a battery change ...
According to Citizen, by 2011 80% of their wristwatches featured Eco-Drive, and the company saw Eco-Drive type watches as the focus of new generations of watches. [ 20 ] In 2012 Citizen offered over 320 Eco-Drive watch models in various types, styles and price ranges.
The movement of the watch draws its power from the rechargeable battery or capacitor. As long as the watch is regularly exposed to fairly strong light (such as sunlight), it never needs a battery replacement. Some models need only a few minutes of sunlight to provide weeks of energy (as in the Citizen Eco-Drive).
The first digital watch was the Pulsar, introduced by the Hamilton Watch Company in 1972. The "Pulsar" became a brand name, and would later be acquired by Seiko in 1978. In 1982, a Pulsar watch (NL C01) was released which could store 24 digits, likely making it the first watch with user-programmable memory, or the first "memorybank" watch.
Button, coin, or watch cells. A button cell, watch battery, or coin battery is a small battery made of a single electrochemical cell and shaped as a squat cylinder typically 5 to 25 mm (0.197 to 0.984 in) in diameter and 1 to 6 mm (0.039 to 0.236 in) high – resembling a button.
The watch was also the first chronometer-grade watch manufactured in Japan and was based on Seiko's own chronometer standard. [ 40 ] [ 41 ] Some Grand Seiko timepieces also incorporate the company's Spring Drive movement, a movement that is a combination of both automatic and quartz timekeeping methods, leading to unparalleled accuracy in the ...