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

Here is Why You Need An Adapter

The outlet and plug type used in Falkland Islands is G and in Saint Martin are C and E. This is how they look like.

Saint Martin

In Saint Martin, outlets of type C and E are in use.

Type C

Type E

Falkland Islands

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

Type G