For verbal command processing, a phoneme module selects recognition phonemes from a phoneme input stream. Timing synchronization parameters are dynamically adapted according to CI estimates calculated from WIDLID energies. The fuel level detection unit includes a base and a float mounted relative to the base so as to have varying position relative to the base depending on the level of fuel in the fuel tank. A passageway 4 for electrolyte 5 is between anode 2 and wall 3.