Green Power Comes Via A Twist Idea

For fans of the NPower Personal Energy Generator, a new kinetic off grid charger concept design with a lot of potential: the Cyclus by Satoshi Yanagisawa (which comes to us via Yanko Design).

The construction of this friendly-looking, lightbulb-shaped device is fairly simple. It consists of a spring, a gear, and a motor. Just hold the Cyclus, twist it up and let it unwind–the embodied energy of the tightly wound spring augments the kinetic energy of your elbow grease to produce 30 minutes worth of energy to a cell phone, MP3 player, lightbulb, or whatever other device you may have that  will work with 6.6 volts/3 watts of power.


image via Yanko Design

The inventor of this device sees it as a boon not just for on-the-go urban dwellers seeking green power for portables, but for the increasing number of people around the world who are using such devices without ready access to the electrical grid (or operating in areas where grid power can be unreliable). A bright idea indeed.


image via Yanko Design

Being as this is a concept, we aren’t sure of price or if it will ever even become a real product. The idea seems pretty sound and simple to build though, so perhaps some electronics company looking for greener gadget ideas might invest in it.

Susan DeFreitas has covered all manner of green technology for EarthTechling since 2009. She is a graduate of Prescott College for the Liberal Arts and the Environment, and has a background in marketing green businesses. Her work on green living has been featured in Yes! Magazine, the Utne Reader and Natural Home.


  • Reply February 13, 2011


    One question to ask of the designer, how many twists to fully charge a phone from empty to full? All other features are besides the point.

  • Reply February 14, 2011


    i don’t know about this thing
    if nothing else it’ll make your phones battery last longer
    a average human can light up a 120volt 60watt bulb with a bicycle generator

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