Eco Factor: Portable power source designed to run on saltwater.
The MetalCell is a backup power source that runs on saltwater or urine and can keep a laptop running for more than four hours. The emergency power source is manufactured by a South Korean company for military situations where it is hard to find power to keep portable electronic devices working.
Aside from simple saltwater, the device can also run on urine. The device includes magnesium plates, which react with sodium to generate electricity. Small enough to be transported easily, the device can power anything from a laptop to a flashlight.
Via: Treehugger/Popular Science
