A cell for testing an electrochemical battery, characterised in that the cell comprises two electrodes, preferentially made of vitreous carbon, intended to be in electrical contact with the battery to be tested; the cell comprising: a. a test cell made of non-conductive ceramic or of polyetheretherketone, comprising: i. a cavity intended to receive the battery to be tested, the battery being intended to be subjected to an electrochemical cycle; ii. an outlet orifice for gas generated during the electrochemical cycle, the outlet orifice being fluidically connected with the cavity and with a section substantially at right angles to a first axis; b. a device for applying a temperature and a pressure to the battery, comprising the two electrodes, the device being tight to the gases generated by the battery during the electrochemical cycle, the electrodes being made of a corrosion-resistant material; wherein: c. the test cell comprises a through opening extending along a second axis, secant with the first axis, preferentially at right angles, including the cavity, and d. the application device comprises a bottom metal part and a top metal part, each comprising a protuberance (33, 34) extending along the second axis in the through opening and of complementary shape to the through opening, each protuberance (33, 34) being terminated by one of the two electrodes, preferentially fixed to said protuberance (33, 34) by a conductive glue; the bottom part and the top part being movable in translation along the second axis relative to one another, so as to apply the pressure to the battery. the cell comprising: a. a test cell made of non-conductive ceramic or of polyetheretherketone, comprising: i. a cavity intended to receive the battery to be tested, the battery being intended to be subjected to an electrochemical cycle; ii. an outlet orifice for gas generated during the electrochemical cycle, the outlet orifice being fluidically connected with the cavity and with a section substantially at right angles to a first axis; b. a device for applying a temperature and a pressure to the battery, comprising the two electrodes, the device being tight to the gases generated by the battery during the electrochemical cycle, the electrodes being made of a corrosion-resistant material; a. a test cell made of non-conductive ceramic or of polyetheretherketone, comprising: i. a cavity intended to receive the battery to be tested, the battery being intended to be subjected to an electrochemical cycle; ii. an outlet orifice for gas generated during the electrochemical cycle, the outlet orifice being fluidically connected with the cavity and with a section substantially at right angles to a first axis; i. a cavity intended to receive the battery to be tested, the battery being intended to be subjected to an electrochemical cycle; ii. an outlet orifice for gas generated during the electrochemical cycle, the outlet orifice being fluidically connected with the cavity and with a section substantially at right angles to a first axis; b. a device for applying a temperature and a pressure to the battery, comprising the two electrodes, the device being tight to the gases generated by the battery during the electrochemical cycle, the electrodes being made of a corrosion-resistant material; wherein: c. the test cell comprises a through opening extending along a second axis, secant with the first axis, preferentially at right angles, including the cavity, and d. the application device comprises a bottom metal part and a top metal part, each comprising a protuberance (33, 34) extending along the second axis in the through opening and of complementary shape to the through opening, each protuberance (33, 34) being terminated by one of the two electrodes, preferentially fixed to said protuberance (33, 34) by a conductive glue; c. the test cell comprises a through opening extending along a second axis, secant with the first axis, preferentially at right angles, including the cavity, and d. the application device comprises a bottom metal part and a top metal part, each comprising a protuberance (33, 34) extending along the second axis in the through opening and of complementary shape to the through opening, each protuberance (33, 34) being terminated by one of the two electrodes, preferentially fixed to said protuberance (33, 34) by a conductive glue; the bottom part and the top part being movable in translation along the second axis relative to one another, so as to apply the pressure to the battery.