NOVELTY - The device has restriction elements (42, 42A) comprising a tapered surface (43) that is in line contact with an outer periphery of an end face of a battery (Bt) when each element is located in a space to apply force to move the battery along radial direction of the battery. A side face of the battery is not in contact with the surface by a surface contact. A support surface (44) receives moving force along the radial direction from the surface and supports the side face of the battery by reactive force. A support element (33) is made of elastic material i.e. rubber.    USE - Battery device for holding batteries such as cylindrical general-purpose batteries and lithium ion batteries use as automobile power sources.    ADVANTAGE - The support surface is formed with the surface contact, so that multiple batteries are positioned along the axial direction by utilizing the support surface as a reference plane. The device determines intervals between the respective batteries to be fixed by the restriction elements, so that passages are formed at fixed intervals for flowing cooling medium i.e. air, between the batteries and efficiently cool down the batteries, thus reducing temperature variation of the batteries and equalizing temperatures of the batteries, and hence prolonging entire battery service life. The tapered surface is made of hard resin material e.g. PPS, and transfers the force received from edges of the batteries to the support surface without reduction, so that the support surface effectively supports the side face of the battery, thus reducing positional misalignment of the batteries associated with aged deterioration.    DETAILED DESCRIPTION - The side face of the batteries is formed as a cylindrical-shaped structure. The support surface and the tapered surface are a curved surface.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a battery device taken on a line 4-4.    Battery (Bt)    Support element (33)    Restriction elements (42, 42A)    Tapered surface (43)    Support surface (44)