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Eco-Drive is designed to convert both natural and artificial light into energy to power watches. Watches with Eco-Drive do not require any battery replacement, charging or winding to maintain constant operation. CITIZEN’s proprietary light-powered technology Eco-Drive is an exceptional technological achievement that also reflects our concern for the natural surroundings. The name and logo display our commitment to building a brand for people all over the world. CITIZEN’s Eco-Drive technology has won acclaim in Japan for its contribution to environmental protection. Eco-Drive watch was nominated as the first watch to qualify for the Eco Mark, a label managed by the Japan Environment Association (JEA). Once upon a time, everyone accepted that quartz watches had to have their batteries replaced at regular intervals. But the advent of Eco-Drive overturned the conventional thinking. Eco-Drive is a light-powered technology that drives watches by capturing light and converting it into energy using an inbuilt solar cell. Suddenly the hassle of replacing batteries was a thing of the past.