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

Here is Why You Need An Adapter

The outlet and plug type used in Palestine are C and H and in Niger are C, D, E and F. This is how they look like.

Niger

In Niger, outlets of type C, D, E and F are in use.

Type C

Type D

Type E

Type F

Palestine

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

Type C

Type H