THIS has got to be one of the "most asked" questions, but honestly, I searched this forum, the internet and Amazon and got a real mixed bag info and advice, so I'm posting fresh :0}
A good resource I found was on REI "Expert Advice". The type of adapter is listed by country. Some countries list two types of adapters, if this is the case, they recommend you bring both.
I've determined I will need 3- USB-A (to lightning, for my iPhone, iPad, extra battery pack), 1-2 A/C outlet (for my MacBook Air computer, and Sonicare electric toothbrush), and 2- USB-C (for the future because that is what the world is coming to, so I'll be ready).
I'm traveling to Germany, France and Portugal so I'm supposed to take both C and E/F adapters.
Cepics offers plug adapters for the whole world that look very well made, however, they lack outlets! I called their customer support number 877-260-1301 and they said I'd need to buy single adapters that have only 1x USB-A and 1x USB-C. (Disappointing)
Is there a company that produces a travel adapter that has a world-wide selection of interchangeable plug types, that can be purchased separately, with plenty of outlets? I'd sure appreciate knowing it if there is.
P.S. I just called RS store and asked about their EU universal travel adapter, which does have all the adapters used in Europe (as promised) however there are no USB outlets at all, you'd need to bring the little USB/AC block to interface. :0(
Any wisdom on the subject will be most appreciated! THANKS!