A rechargeable battery having an integrated cell, comprising: a protective circuit board disposed on a protective board support structure and at a top of the battery, wherein the protective circuit board comprises a USB interface for charging the battery and a socket ; and a cell disposed at a base of the battery and comprising a jellyroll and a metal housing which is a cylindrical structure with a closed end, wherein a housing of the battery is made up of the metal housing , an open end of the metal housing encapsulates the cell through an explosion-proof plug , and the cell is electrically connected to the protective circuit board through the socket ; wherein the explosion-proof plug comprises an explosion-proof plug body , the explosion-proof plug body is provided with a positive pinhole through which a positive electrode of the cell is allowed to pass and a negative pinhole through which a negative electrode of the cell is allowed to pass, and the positive electrode and the negative electrode of the cell are electrically connected to the protective circuit board after passing through the positive pinhole and the negative pinhole respectively; wherein the explosion-proof plug is located inside the metal housing so that the protective circuit board is partially located in the metal housing , the metal housing is provided with a groove at a position at which the explosion-proof plug is disposed, the groove is formed by concaving the metal housing , and the explosion-proof plug is disposed at the groove and abuts against an inner wall of the groove to seal up the cell ; and wherein the groove is a roll groove formed by rolling on the metal housing . a protective circuit board disposed on a protective board support structure and at a top of the battery, wherein the protective circuit board comprises a USB interface for charging the battery and a socket ; and a cell disposed at a base of the battery and comprising a jellyroll and a metal housing which is a cylindrical structure with a closed end, wherein a housing of the battery is made up of the metal housing , an open end of the metal housing encapsulates the cell through an explosion-proof plug , and the cell is electrically connected to the protective circuit board through the socket ; wherein the explosion-proof plug comprises an explosion-proof plug body , the explosion-proof plug body is provided with a positive pinhole through which a positive electrode of the cell is allowed to pass and a negative pinhole through which a negative electrode of the cell is allowed to pass, and the positive electrode and the negative electrode of the cell are electrically connected to the protective circuit board after passing through the positive pinhole and the negative pinhole respectively; wherein the explosion-proof plug is located inside the metal housing so that the protective circuit board is partially located in the metal housing , the metal housing is provided with a groove at a position at which the explosion-proof plug is disposed, the groove is formed by concaving the metal housing , and the explosion-proof plug is disposed at the groove and abuts against an inner wall of the groove to seal up the cell ; and wherein the groove is a roll groove formed by rolling on the metal housing . <EOS>