You Do Need power plug adapter while traveling from Antigua and Barbuda to Congo.

Here is Why You Need An Adapter

The outlet and plug type used in Congo are C, D and E and in Antigua and Barbuda are A and B. This is how they look like.

Antigua and Barbuda

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

Type A

Type B

Congo

In Congo, outlets of type C, D and E are in use.

Type C

Type D

Type E