Don’t require power plug adapter while traveling from Madeira 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 Madeira are C and F and they are compatible with each other.

Madeira

In Madeira, outlets of type C and F are in use.

Type C

Type F

Guinea-Bissau

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

Type C