I'm soon moving from the UK to the US and have several items (iPod docs, etc) running on DC power (13v, 5v, etc). Can I run these items in the US by simply buying a UK to US plug adaptor (not power convertor)? Or would I need to buy a new US DC input for each item? Or are they even transferrable from the UK to the US at all? (for example, I know that I will have to buy a power 'convertor', not just adaptor, for my vacuum cleaner and crock pot if I want to bring them over).