'Cyclus' by Satoshi Yanagisawa is a light bulb-shaped spring-driven portable power generator. By twisting the base, users can power their precious gadgets on the go. A couple of twists produces electricity for 30 minutes -- not bad!

We've seen several designs for personal power suppliers pop up in the past few months. After you check out more images of 'Cyclus' by Satoshi Yanagisawa, be sure to keep clicking to see past designs.