Don’t require power plug adapter while traveling from Tuvalu to Tonga.

Here's why you do not need an adapter

The outlet and plug type used in Tonga is I and in Tuvalu is I and they are compatible with each other.

Tuvalu

In Tuvalu, outlets of type I are in use.

Type I

Tonga

In Tonga, outlets of type I are in use.

Type I