NOVELTY - An electrochemical cell system comprises several fluidly connected electrochemical cells (10). Each cell comprises an anode (14) configured to permit a fluid comprising at least an electrolyte, and a cathode (12) permeable to an oxidizer. Electrochemical cells are connected in fluid flow series in pairs such that fluid flows from a primary cell of pair of cells to a secondary cell of the pair of cells. An ionic resistance provided between the pair of fluidly connected electrochemical cells is more than ionic resistance within one electrochemical cell in the pair of cells.    USE - Electrochemical cell system is used for producing electrical power (claimed) in vehicles.    ADVANTAGE - The electrochemical cell system is compact, and has favorable charging and discharging characteristics.    DETAILED DESCRIPTION - An electrochemical cell system comprises several fluidly connected electrochemical cells. Each electrochemical cell comprises an anode configured to permit a fluid comprising at least an electrolyte to flow in contact to oxidize a fuel, and a cathode permeable to an oxidizer. The cathode is configured to receive electrons to reduce the oxidizer. The cathode and anode are spaced apart to provide a gap (30) for receiving the fluid flow. Electrochemical cells are connected in fluid flow series in pairs such that fluid flows from a primary cell of pair of cells to a secondary cell of the pair of cells. The electrochemical cells are connected electrically in series in pairs such that the cathode of the primary cell of the pair is electrically connected to the anode of the secondary cell of the pair. An ionic resistance provided between the pair of fluidly connected electrochemical cells is more than an ionic resistance within one electrochemical cell in the pair of cells. An INDEPENDENT CLAIM is included for method for generating electrical current using electrochemical cell system.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of electrochemical cell.    Electrochemical cell (10)    Cathode (12)    Anode (14)    Gap (30)    Return space (32)