You Do Need power plug adapter while traveling from Faroe Islands to Niger.

Here is Why You Need An Adapter

The outlet and plug type used in Niger are C, D, E and F and in Faroe Islands are C, E, F and K. This is how they look like.

Faroe Islands

In Faroe Islands, outlets of type C, E, F and K are in use.

Type C

Type E

Type F

Type K

Niger

In Niger, outlets of type C, D, E and F are in use.

Type C

Type D

Type E

Type F