The endcover assembly for a combustor includes an endcover having an aperture, an insert disposed in the stepped bore opening through an internal face of the endcover, a fuel cartridge extending through the insert and aperture and a seal cover on the external face of the endcover. That is, the present invention aims to monitor whether the user utilizes the refrigerator and to control the brightness of the display portion of the refrigerator such that the display portion can be kept bright only when the user utilizes the refrigerator. The inorganic layer is in a state in which the inorganic layer is bound to both of the cathode active material layer and the anode active material layer. The customer data may be received from an NFC-capable physical token such as an EMV card, or a virtual token presented by a customer portable computing device using a NFC or a machine-readable optical code.