NOVELTY - Generating electrical current involves flowing a flow of fuel and electrolyte via a channel, where fuel is oxidized at anode (108) to generate electrons for conduction to load (L) and oxidation products; and flowing second flow of oxidizer and second electrolyte via second channel, where cathode (102) receive electrons from load and oxidation products, and oxidizer is reduced. Exchange zones (134) are positioned and flows are oriented within their respective channels so the flows contact one another intermittently at the zones to enable transport of the products to anode and cathode.    USE - For generating electrical current (claimed).    ADVANTAGE - By arranging the first fluid passageway and the second fluid passageway in such that the contact area between the two streams (i.e. of anolyte and catholyte) flowing through the passageways is minimized, but the instances or frequency of contact between the two streams may be increased. This may reduce the overall diffusive mixing effects, maintain a stable flow pattern in each of the passageways and allow for an overall large area for ion exchange. This arrangement also allows no cross-over of un-reacted fuel and oxidizer from one fluid passageway to the other fluid passageway. The insulator is configured to prevent a short-circuit between the anode and the cathode, i.e. prevent the anode and cathode from directly conducting electrons between each other, so that the electrons only conducted through the load, while still allowing for ionic or molecular exchange.    DETAILED DESCRIPTION - Generating electrical current using a fuel cell (100) comprising an anode (108), a cathode (102), a first flow channel associated with the anode, a second flow channel associated with the cathode, and spaced apart exchange zones (134) where the flow channels are open to one another, involves flowing a first flow comprising a fuel and a first electrolyte through the first channel, where the fuel is oxidized at the anode to generate electrons for conduction to a load (L) and oxidation products in the first flow; and flowing a second flow comprising an oxidizer and a second electrolyte through the second channel, where the cathode receive electrons from the load and the oxidation products, and the oxidizer is reduced to form reduction products and complete an electrochemical circuit. The exchange zones are positioned and the flows are oriented within their respective first and second channels such that the first and second flows contact one another intermittently at the exchange zones to enable transport of the reduction and oxidation products to the anode and the cathode. The anode and cathode each comprise a catalyst; and are electrically conductive. The exchange zone comprises a non-conductive porous material configured to electrically isolate the anode and cathode from each other. The method further involves supplying a supporting electrolyte to the exchange zones and transporting a reaction by-product away from the exchange zones and/or delivering fresh supporting electrolyte to the exchange zones. An INDEPENDENT CLAIM is included for a fuel cell comprising an anode configured to be connected to a load; a cathode configured to be connected to the load; a first flow channel associated with the anode, and configured to receive a flow of a fuel and a first electrolyte so that, in use, the fuel is oxidized by the anode to generate electrons for conduction to the load and oxidation products in the first electrolyte; a second flow channel associated with the cathode, and configured to receive a flow of an oxidizer and a second electrolyte so that, in use, the oxidizer is reduced by its reaction with the oxidation products and incoming flux of electrons from the load to form reduction products in the second electrolyte; and spaced apart exchange zones, where the flow channels are open to one another, and are oriented such that the flow of the oxidation products and first electrolyte and the flow of the reduction products and the second electrolyte within their respective first and second channels contact one another intermittently.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view of fuel cell.    Fuel cell (100)    Cathode (102)    Catholyte (105)    Anolyte flow guide (106)    Anolyte (107)    Anode (108)    Current collectors (110, 112)    Exchange zones (134)    Load (L)