Japan-based Nendo has unveiled Denqul, a power bank unlike any others on the market today, as it enables users to charge the device by simply using kinetic energy. In other words, a swivel hinge and internal dynamo are used to generate power by simply twirling it for a few minutes. It’s capable of charging devices with a conventional cable or a special table-top cup set for wireless charging. Continue reading for more pictures and information.”You can then either plug your phone directly into the Denqul charger using a conventional cable (the slim Denqul easily fits in bags too), or use the Denqul with its office table-top set that comes with a charging cup that wirelessly juices your phone while you’re at your desk. Yes, there’s a slick little pen-stand too,” reports Yanko Design.