You Do Need power plug adapter while traveling from Afghanistan to Saint Kitts and Nevis.

Here is Why You Need An Adapter

The outlet and plug type used in Saint Kitts and Nevis are D and G and in Afghanistan are C and F. This is how they look like.

Afghanistan

In Afghanistan, outlets of type C and F are in use.

Type C

Type F

Saint Kitts and Nevis

In Saint Kitts and Nevis, outlets of type D and G are in use.

Type D

Type G