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

Here is Why You Need An Adapter

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

Saint Kitts and Nevis

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

Type D

Type G

Angola

In Angola, outlets of type C are in use.

Type C