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

Here is Why You Need An Adapter

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

Seychelles

In Seychelles, outlets of type G are in use.

Type G

Palestine

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

Type C

Type H