You Do Need power plug adapter while traveling from Nauru to Maldives.

Here is Why You Need An Adapter

The outlet and plug type used in Maldives are C, D, G, J, K and L and in Nauru is I. This is how they look like.

Nauru

In Nauru, outlets of type I are in use.

Type I

Maldives

In Maldives, outlets of type C, D, G, J, K and L are in use.

Type C

Type D

Type G

Type J

Type K

Type L