which transfer excess electrons produced by their central metabolism to the cell surface.
This makes electro genic bacteria candidates for use in electricity-generating devices. use a pair of battery-like terminals connected to an external. When bacteria physically attach to the anode, electrons generated in the interior of the cell are transferred to an external electrode, producing electrical current.
Microbial fuel cells use electrogenic bacteria, such as the Shewanella oneidensis MR-1 bacteria, to produce electric current.