9 Digital media hubs; Digital media receivers; Digital media streaming devices; Batteries and battery charger; Cell phone battery charger; Chargers for batteries; Renewable battery system to provide back-up power; Audio interfaces, audio signal switchers, auxiliary input devices for automotive radios, radio interfaces; portable electronic interfaces, namely, PDA interfaces, in-car entertainment system interfaces, navigation audio and radio interfaces, navigation system interfaces, short range radio interfaces for mobile devices; electronic display interfaces, namely, USB audio and media interfaces for automotive radios, digital media interfaces for automotive radios; wireless interfaces between vehicle sound systems and portable digital video and digital audio players; battery charging adapters; Universal serial bus charging port hardware; docking stations for portable digital video and digital audio players