NOVELTY - The electrical storage apparatus has a main portion (13) that includes an insertion port (13c) which is connected to an accommodating portion (S). A cover (14) obstructs the insertion port. A separator is provided between the positive and negative electrodes. A constraining element (30) has flat-surface-shape restraining surface (30a) that is adapted to cover the one end (12b) of an electrode assembly (12). A Curie temperature of the constraining element is set lower than a minimum temperature of use environment temperature of the battery.    USE - Electrical storage apparatus e.g. secondary battery (claimed) such as lithium ion battery mounted in vehicle such as electric vehicle and plug in hybrid vehicle. Can also be used in nickel-hydrogen secondary battery and electrical double layer capacitor.    ADVANTAGE - The influence of the magnetic element can be eliminated, while suppressing the position shift of the electrode assembly. Since the load is uniformly provided electrode assembly, the positive and negative electrodes and separator can be uniformly stuck along the omni-direction along the surface and generation of the precipitate of lithium can be prevented. The magnetic field does not produce around the electrode assembly at the time of use of the secondary battery, so as to prevent the fluctuation of output of the secondary battery. Since the constraining element suppresses position shift of the electrode assembly, the need of adhesive tape is avoided, so as to simplify the manufacturing process of the secondary battery. By losing the magnetism of the constraining element at an eradication process, the magnetic field can be reliably prevented from forming in the surroundings of the electrode assembly.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the secondary battery.    Electrode assembly (12)    Electrode assembly end (12b)    Main portion (13)    Insertion port (13c)    Cover (14)    Constraining element (30)    Flat-surface-shape restraining surface (30a)    Accommodating portion (S)