(FR2766015-A1)      Electrochemical accumulator comprises a generally cylindrical or prismatic chamber containing liquid electrolyte and an electrochemical set comprising at least an alternation of a positive electrode, a separator, and a negative electrode; said accumulator comprising, at least partially between the closed end of the chamber constituting the base, and the electrochemical set, at least one electrolyte reserve comprising porous material in contact with said set; said porous material, a pololefin which is optionally hydrophilic, being resistant to electrolyte, not less hydrophilic than separator, and practically incompressible.    USE -   As electrochemical accumulator (claimed).    ADVANTAGE -   Accumulator has smaller volume than those constructed in previous work.    (EP931364-A1)      Electrochemical accumulator comprises a generally cylindrical or prismatic chamber containing liquid electrolyte and an electrochemical set comprising at least an alternation of a positive electrode, a separator, and a negative electrode; said accumulator comprising, at least partially between the closed end of the chamber constituting the base, and the electrochemical set, at least one electrolyte reserve comprising porous material in contact with said set; said porous material, a pololefin which is optionally hydrophilic, being resistant to electrolyte, not less hydrophilic than separator, and practically incompressible.    USE -   As electrochemical accumulator (claimed).    ADVANTAGE -   Accumulator has smaller volume than those constructed in previous work.    (JP2001500314-W)      Electrochemical accumulator comprises a generally cylindrical or prismatic chamber containing liquid electrolyte and an electrochemical set comprising at least an alternation of a positive electrode, a separator, and a negative electrode; said accumulator comprising, at least partially between the closed end of the chamber constituting the base, and the electrochemical set, at least one electrolyte reserve comprising porous material in contact with said set; said porous material, a pololefin which is optionally hydrophilic, being resistant to electrolyte, not less hydrophilic than separator, and practically incompressible.    USE -   As electrochemical accumulator (claimed).    ADVANTAGE -   Accumulator has smaller volume than those constructed in previous work.