You Do Need power plug adapter while traveling from Niger to Central African Republic.

Here is Why You Need An Adapter

The outlet and plug type used in Central African Republic are C and E and in Niger are C, D, E and F. This is how they look like.

Niger

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

Type C

Type D

Type E

Type F

Central African Republic

In Central African Republic, outlets of type C and E are in use.

Type C

Type E