I'v heard of DNA doing computing but viruses building batteries is new to me.
WASHINGTON, Apr. 3, 2009 (Reuters) — Researchers who have trained a tiny virus to do their bidding said on Thursday they made it build a more efficient and powerful lithium battery.
They changed two genes in the virus, called M13, and got it to do two things: build a shell made out of a compound called iron phosphate, and then attach to a carbon nanotube to make a powerful and tiny electrode.
Such an electrode could conceivably make more powerful memory devices such as MP3 players or cellular telephones, and are far more environmentally friendly than current battery technologies, said Angela Belcher, a Massachusetts Institute of Technology materials scientist who led the research.
"It has some of the same capacity and energy power performance as the best commercially available state-of-the-art batteries," Belcher said in a telephone interview.
"We could run an iPod on it for about three times as long as current iPod batteries. If we really scale it, it would be used in a car," she added. Such scaling is not even close, Belcher cautioned.
http://www.newsdaily.com/stories/tre5317a1-us-batteries-viruses/