Don’t require power plug adapter while traveling from Mongolia to Guinea-Bissau.

Here's why you do not need an adapter

The outlet and plug type used in Guinea-Bissau is C and in Mongolia are C and E and they are compatible with each other.

Mongolia

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

Type C

Type E

Guinea-Bissau

In Guinea-Bissau, outlets of type C are in use.

Type C