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

Here is Why You Need An Adapter

The outlet and plug type used in Palestine are C and H and in Saint Barthélemy are C and E. This is how they look like.

Saint Barthélemy

In Saint Barthélemy, outlets of type C and E are in use.

Type C

Type E

Palestine

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

Type C

Type H