It may become a thing of the past with Fasetto's Audio Cu which can send high-quality audio to speakers over a home's AC ...

Not only do you have to ensure that every plug socket has a cable attached to it, but you also (or rather, should) ensure ...

If you need to charge a car full of gadgets at once, more expensive adapters with multiple ports are available, but these tend to be larger and have a cable to plug into the 12V socket.