NOVELTY - The system has electrochemical cells (12) having fuel electrode (14), oxidant electrode (16), charging electrode (18), and ionically conductive medium communicating the electrodes. The switches (84) are switched to discharge/charge mode in which oxidant/charging electrode of each electrochemical cell is coupled to fuel electrode of subsequent cell. The charging electrode of preset cell is coupled to oxidant/fuel electrode of subsequent cell in charge/discharge mode in bypass mode.    USE - Rechargeable electrochemical cell system for generating electrical current.    ADVANTAGE - The reliability and performance of each cell stack can be improved by switching the switches top bypass mode. The potential difference can be is created within each cell by oxidation of fuel at fuel electrodes and reduction of oxidant at oxidant electrodes when the switches are switched to discharge mode. The incremental potential difference can be created within each cell to reduce reducible fuel species at the fuel electrode and oxidize an oxidizable oxidant species at the charging electrode in the charge mode.    DETAILED DESCRIPTION - The system has switches that are switched to discharge/charge mode in which oxidant/charging electrode of each electrochemical cell is coupled to fuel electrode of subsequent cell. A potential difference is created within each cell by oxidation of fuel at fuel electrodes and reduction of oxidant at oxidant electrodes when the switches are switched to discharge mode. The incremental potential difference is created within each cell to reduce reducible fuel species at the fuel electrode and oxidize an oxidizable oxidant species at the charging electrode in the charge mode. The cumulative potential difference anodic at fuel electrode of first cell and cathodic at oxidant electrode of last cell for delivering current to load is created or charging potential difference cathodic at fuel electrode of first cell and anodic at charging electrode of last cell is received when fuel electrode of first cell and oxidant/charging electrode of last cell are coupled to load/power source. The charging electrode of previous cell is coupled to oxidant/fuel electrode of subsequent cell in charge/discharge mode in bypass mode.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the rechargeable electrochemical cell system.    Electrochemical cell (12)    Electrode (14)    Oxidant electrode (16)    Charging electrode (18)    Switches (84)