You Do Need power plug adapter while traveling from Mauritania to Falkland Islands.

Here is Why You Need An Adapter

The outlet and plug type used in Falkland Islands is G and in Mauritania is C. This is how they look like.

Mauritania

In Mauritania, outlets of type C are in use.

Type C

Falkland Islands

In Falkland Islands, outlets of type G are in use.

Type G