A method and apparatus are provided for sealing a vehicle cargo area to a loading dock. The alkali metal-ion secondary battery according to the present invention includes a negative electrode, a positive electrode containing a metal chloride and an alkali metal chloride, and a sulfur dioxide-based inorganic electrolyte solution containing an inorganic electrolyte including sulfur dioxide and an alkali metal salt. The transponded GPS signal sent from a GSAT to the GDER can include a frequency shifted copy of a GPS signal from a GPS satellite to the GSAT. According to the disclosure, an active area and a non-active area are defined through ion-implanting.