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

Here is Why You Need An Adapter

The outlet and plug type used in Sierra Leone are D and G 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

Sierra Leone

In Sierra Leone, outlets of type D and G are in use.

Type D

Type G