‘Cool’ fuel cells could revolutionize Earth’s energy resources 
A fuel cell of this type only as large as four sugar cubes could power a laptop
http://www.eurekalert.org/pub_releases/2004-07/uoh-fc072204.php

A fuel cell of this type only as large as four sugar cubes could power a laptop
http://www.eurekalert.org/pub_releases/2004-07/uoh-fc072204.php