You Do Need power plug adapter while traveling from British Virgin Islands 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 British Virgin Islands are A and B. This is how they look like.

British Virgin Islands

In British Virgin Islands, outlets of type A and B are in use.

Type A

Type B

Equatorial Guinea

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

Type C

Type E