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Using solar power, make the portable charger the simplest. Consideration of weight and volume, it can't store electric by it self. It have to link with your phone, thus can make electric. Make it immediately, simply.
Recently, people more and more depend on 3C products. So, if it don’t have enough electric power, it will be a terrible problem. Our design using solar energy coating with multiple plastic. Thus it can be stamp convenience like memo paper, and make 3C product insert power.