You Do Need power plug adapter while traveling from Bosnia & Herzegovina to Nauru.

Here is Why You Need An Adapter

The outlet and plug type used in Nauru is I and in Bosnia & Herzegovina are C and F. This is how they look like.

In Bosnia & Herzegovina, outlets of type C and F are in use.

Type C

Type F

In Nauru, outlets of type I are in use.

Type I

I am from

going to