Roll Battery Charger / Phone charger

Although a supplementary battery for cell phone is released, people still find it uncomfortable not only because of its inconvenience in portability and recharging, but because its long cable with a supplementary battery is so easily entangled that a bag may be messy. What is worse, sometimes a cable is short to connect to an outlet. We propose a ‘Roll Battery Charger’, whose motive comes from people’s pattern showing they wind a cable to carry it and this will make it convenient for people to carry it and they won’t fill uncomfortable regardless of the length of a cable.