A:AnswerYes, this Travel Power Adapter will work in Tonga. You will use adapter part B (AU, US). The included manual will direct how to set it up and provide a list of places this item will work at.
A:AnswerHello, I went to targus website and verified the user manual for the adapter APK01US amd it says "This is a non-grounded adapter. Do not use with grounded devices".
A:AnswerThe included manual does have this information. For US power cords to be plugged into a UK outlet you would be using adapter parts A and C. If you have any other questions about this adapter please feel free to call our customer support team. They can be reached at 877-482-7487 Monday thru Friday 10 AM to 7 PM EST.