If your traveling internationally, you will definitely need a travel adapter. The plugs and voltage in the U.S. are not the same in every country so you’ll need a good power bank with multiple adapters in order to charge you electronics once you reach your destination. Here we have provided a guide on the common plugs, associated country of usage, and voltage for your future travels.
Common Plugs
Plugs, Electrical Info & Countries
The Traveller's Wife 