You Do Need power plug adapter while traveling from Maldives to Cocos (Keeling) Islands.

Here is Why You Need An Adapter

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

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

Cocos (Keeling) Islands

In Cocos (Keeling) Islands, outlets of type I are in use.

Type I