virusenergy.com

The same means of generating a charge that allows scanning probe microscopes, cigarette lighters, and push-start propane barbecues to function can now be harnessed from viruses. Researchers at Berkeley Lab have in fact developed a way to generate power using a virus called M13 bacteriophage to convert mechanical energy into electricity. The technology could one day lead to gadgets like smartphones that harvest energy from everyday movements, such as walking.

http://newscenter.lbl.gov/2012/05/13/electricity-from-viruses/