You Do Need power plug adapter while traveling from Togo to Congo.

Here is Why You Need An Adapter

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

Togo

In Togo, outlets of type C are in use.

Type C

Congo

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

Type C

Type D

Type E