You Do Need power plug adapter while traveling from Cape Verde to San Marino.

Here is Why You Need An Adapter

The outlet and plug type used in San Marino are C, F and L and in Cape Verde are C and F. This is how they look like.

Cape Verde

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

Type C

Type F

San Marino

In San Marino, outlets of type C, F and L are in use.

Type C

Type F

Type L