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

Here is Why You Need An Adapter

The outlet and plug type used in Argentina are C and I and in Sierra Leone are D and G. This is how they look like.

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

Type D

Type G

In Argentina, outlets of type C and I are in use.

Type C

Type I

I am from

going to