You Do Need power plug adapter while traveling from American Samoa to Equatorial Guinea.

Here is Why You Need An Adapter

The outlet and plug type used in Equatorial Guinea are C and E and in American Samoa are A, B, F and I. This is how they look like.

American Samoa

In American Samoa, outlets of type A, B, F and I are in use.

Type A

Type B

Type F

Type I

Equatorial Guinea

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

Type C

Type E