You Do Need power plug adapter while traveling from South Sudan to Liberia.

Here is Why You Need An Adapter

The outlet and plug type used in Liberia are A, B, C and F and in South Sudan are C and D. This is how they look like.

South Sudan

In South Sudan, outlets of type C and D are in use.

Type C

Type D

Liberia

In Liberia, outlets of type A, B, C and F are in use.

Type A

Type B

Type C

Type F