NOVELTY - A fuel cell (10) with an anode compartment (1) and a cathode compartment (3), comprises in the anode compartment, an anode electrode, and dehydrogenation enzyme(s) to transfer electrons from a 1 carbon compound to electron carrier(s); and in the cathode compartment, a cathode electrode which when a conductive pathway to the first electrode (4) is formed, convey the electrons to an electron acceptor composition in the cathode compartment.    USE - For producing electrical power (claimed), or used as power supplies for mobile computing, digital imagers, portable electronic games, audio devices, or telephone devices.    ADVANTAGE - The invention can operate at moderate temperatures and without the presence of harsh chemicals maintained at high temperatures, which can lead to corrosion of the cell components; and has increased sustainable efficiency. It is practical to recharge the invention with fuel, with the recharging done by the consumer or through a service such as a mail order service.    DETAILED DESCRIPTION - A fuel cell with an anode compartment and a cathode compartment, comprises in the anode compartment, an anode electrode, and dehydrogenation enzyme(s) to transfer electrons from a 1C compound to electron carrier(s); in the cathode compartment, a cathode electrode which when a conductive pathway to the first electrode is formed, convey the electrons to an electron acceptor composition in the cathode compartment; and a barrier separating the anode compartment from the cathode compartment to convey protons from the anode compartment to the cathode compartment. The electron carrier(s) are selected to operate with the dehydrogenase enzymes and to deliver electrons to the anode electrode, to electron transfer mediator(s) selected to deliver electrons to the anode electrode, where the anode compartment further comprises the electron transfer mediator(s), or to a redox enzyme selected to deliver electrons to second electron carrier(s), the second electron carrier(s) selected to deliver electrons to electron transfer mediator(s) selected to deliver the electrons to the anode electrode, where the anode compartment further comprises the redox enzymes, second electron carrier(s) and electron transfer mediator(s).    INDEPENDENT CLAIMS are also included for:    (a) a method of producing electrical power comprising in an anode compartment, enzymatically reducing electron carrier(s) with electrons from a 1C compound; directly transferring the electrons from the electron carrier(s) to an anode electrode; transferring electrical current via an electrical conduit under an electrical load to a cathode electrode; and transferring the electrons from the cathode electrode to an electron acceptor composition; and    (b) a method of preserving the function of a polypeptide in the presence of non-aqueous solvents, comprising forming a solution of block copolymers in a solvent comprising a non-aqueous solvent(s); and subsequently adding polypeptide to the solution.    DESCRIPTION OF DRAWING(S) - The figure schematically illustrates a fuel cell.    Anode compartment (1)    Polymeric membrane (2)    Cathode compartment (3)    First electrode (4)    Fuel cell (10)