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

Here's why you do not need an adapter

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

Tonga

In Tonga, outlets of type I are in use.

Type I

Kiribati

In Kiribati, outlets of type I are in use.

Type I