You Do Need power plug adapter while traveling from Cameroon to Israel.

Here is Why You Need An Adapter

The outlet and plug type used in Israel are C and H and in Cameroon are C and E. This is how they look like.

Cameroon

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

Type C

Type E

Israel

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

Type C

Type H