Research shows that computer circuits can be built to work without electricity.
A tiny initial charge is all that is needed. Most experts believe that standard computer processors can only be miniaturised so far, before classical physics fails and strange quantum effects take over. This new technology could be a replacement as it can in theory be shrunk to the molecular scale. This has the advantages of switching very quickly and using very low power. The key to the new technology is a cell with four tiny dots of material which can capture electrons.