NOVELTY - A flexible biofuel cell strip comprises a flexible wrapping surrounding anode, fuel compartment, and cathode where the wrapping in contact with the cathode is permeable to oxygen in atmosphere; and at least two electric leads penetrating the wrapping and connected to the anode and cathode where the leads are attached to recharge a battery or power an electronic device.    USE - A flexible biofuel cell strip for lower power applications such as trickle charging to extend charge of conventional batteries or power devices, e.g. microsensors, micropumps or miniaturized medical devices.    ADVANTAGE - The strip allows to be shaped into a wide variety of conformations and applications including attachment to or implantation within living organisms.    DETAILED DESCRIPTION - A flexible biofuel cell strip comprises an anode comprising a flat, flexible, electrically conducting substrate, carbon nanotubes linked to flexible substrate, a linking polymer linked to carbon nanotubes, and a redox enzyme linked to linking polymer; a fuel compartment ( greater than or equal to 95% in contact with the anode) comprising a substrate for the redox enzyme suspended or dissolved in a gel, polymer matrix, or aqueous solvent; a cathode separated from the fuel compartment and greater than or equal to 95% in contact with a proton permeable membrane (15), and comprising a flat, flexible, electrically conducting substrate coated with a mixture of carbon nanotubes, polymer, and nanoparticles of conducting metal; a flexible wrapping surrounding the anode, fuel compartment, and cathode where the wrapping in contact with the cathode is permeable to oxygen in atmosphere; and at least two electric leads penetrating the wrapping and connected to the anode and cathode where the leads are attached to recharge a battery or power an electronic device. An INDEPENDENT CLAIM is included for a method for harvesting electrical energy from a living cell.    DESCRIPTION OF DRAWING(S) - The drawing is a cross-sectional view of a power strip for use on a plant or animal.    Air-breathing cathode matrix (10)    Membrane (15)    Anolyte (20)    Anode electrolyte (22)    Wrapping material (90)    Needles (95)