Virus can produce energy?

Authors have developed a phage-based piezoelectric generator that produces up to 6 nA of current and 400 mV of potential and use it to operate a liquid-crystal display. Because biotechnology techniques enable large-scale production of genetically modified phages, phage-based piezoelectric materials potentially offer a simple and environmentally friendly approach to piezoelectric energy generation.
For more information :  http://www.nature.com/nnano/journal/vaop/ncurrent/full/nnano.2012.69.html