(WO9702614-A1)      The fuel cell device (2) has a fuel cell block (4) with anode and cathode parts (6,8) and at least one heat source (12,14) for heating the fuel cell block, pref. located outside the fuel cell block.    Pref. the heat source is provided by an electric heating element, contained within a thermally insulated fuel cell container (10), filled with a heat transfer material (11) for transfer of heat to the fuel cell block.    ADVANTAGE -   Simple heat source, which provides good temp regulation characteristics with min. loss of heat to environment.    (EP835530-A1)      The fuel cell device (2) has a fuel cell block (4) with anode and cathode parts (6,8) and at least one heat source (12,14) for heating the fuel cell block, pref. located outside the fuel cell block.    Pref. the heat source is provided by an electric heating element, contained within a thermally insulated fuel cell container (10), filled with a heat transfer material (11) for transfer of heat to the fuel cell block.    ADVANTAGE -   Simple heat source, which provides good temp regulation characteristics with min. loss of heat to environment.    (JP11508725-W)      The fuel cell device (2) has a fuel cell block (4) with anode and cathode parts (6,8) and at least one heat source (12,14) for heating the fuel cell block, pref. located outside the fuel cell block.    Pref. the heat source is provided by an electric heating element, contained within a thermally insulated fuel cell container (10), filled with a heat transfer material (11) for transfer of heat to the fuel cell block.    ADVANTAGE -   Simple heat source, which provides good temp regulation characteristics with min. loss of heat to environment.    (US5942344-A)      The fuel cell device (2) has a fuel cell block (4) with anode and cathode parts (6,8) and at least one heat source (12,14) for heating the fuel cell block, pref. located outside the fuel cell block.    Pref. the heat source is provided by an electric heating element, contained within a thermally insulated fuel cell container (10), filled with a heat transfer material (11) for transfer of heat to the fuel cell block.    ADVANTAGE -   Simple heat source, which provides good temp regulation characteristics with min. loss of heat to environment.    (EP835530-B1)      The fuel cell device (2) has a fuel cell block (4) with anode and cathode parts (6,8) and at least one heat source (12,14) for heating the fuel cell block, pref. located outside the fuel cell block.    Pref. the heat source is provided by an electric heating element, contained within a thermally insulated fuel cell container (10), filled with a heat transfer material (11) for transfer of heat to the fuel cell block.    ADVANTAGE -   Simple heat source, which provides good temp regulation characteristics with min. loss of heat to environment.