You Do Need power plug adapter while traveling from Sint Eustatius 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 Sint Eustatius are A, B, C and F. This is how they look like.

Sint Eustatius

In Sint Eustatius, outlets of type A, B, C and F are in use.

Type A

Type B

Type C

Type F

Equatorial Guinea

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

Type C

Type E