You Do Need power plug adapter while traveling from Andorra to Palestine.

Here is Why You Need An Adapter

The outlet and plug type used in Palestine are C and H and in Andorra are C and F. This is how they look like.

Andorra

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

Type C

Type F

Palestine

In Palestine, outlets of type C and H are in use.

Type C

Type H