A method of operation of a power supply system includes: providing a source voltage with a power source; generating a device voltage with the source voltage; monitoring the source voltage and the device voltage; and supplying the device voltage to a mobile device with the device voltage controlled by a control unit. The vehicle is equipped with a system to compress and store the lighter-than-air gas. The store or dispense equipment may include vending machines, appliances, coolers, dispensers such as food dispensers and beverage dispensers, and other like electrical equipment. A first CRC is performed with the data part and the CRC part demasked with the first WTRU ID. A user interface, such as a wireless control unit, may send a trigger signal to the base station either directly or via the audio data file-handling device.