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

Here is Why You Need An Adapter

The outlet and plug type used in Ecuador are A and B and in Equatorial Guinea are C and E. This is how they look like.

Equatorial Guinea

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

Type C

Type E

Ecuador

In Ecuador, outlets of type A and B are in use.

Type A

Type B