Carrying cases, holders, protective cases and stands featuring power supply connectors, adaptors, speakers and battery charging devices, specially adapted for use with handheld digital electronic devices, namely, cell phones, MP3 players, personal digital assistants; Computer network adapters, switches, routers and hubs; Power adapters; Power adapters for computers; Power adapters for use in vehicle lighter sockets; Power supply connectors and adaptors for use with portable electronic devices