A battery-type power supply unit includes a plurality of rod-shaped battery modules having a plurality of batteries connected together in series. A magnetic coupling couples the expansion turbine to the pump. The components include base units, decorative end units and gate units, each of which may be attached to the other components in any combination thereof. For messages corresponding to connection establishment, user authentication and other protocol-specific messages, for example, the email compression application may be configured to forward the messages to the originally intended destination.