A thermodynamic system that produces mechanical, electrical power, andor fluid streams for heating or cooling. The method can also include displaying a visual indication or generating an audio intervention based on the determined amount of time corresponding to an absence of input. Specialized connectors attach to the ends of the laterally-extending and transverse frame members, which in turn are secured to the frame members. The shutdown signal activates a charging circuit, which supplies a charging current to the load. A computer on-board the electric vehicle is interfaced with the wireless communications circuitry and is configured to interface with the batteries via the connection to the receptacle slots to access a level of charge of the batteries present in the receptacle slots to enable data regarding the level of charge to be accessed by the application.