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

Here is Why You Need An Adapter

The outlet and plug type used in Belize are A, B and G and in Israel are C and H. This is how they look like.

Israel

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

Type C

Type H

Belize

In Belize, outlets of type A, B and G are in use.

Type A

Type B

Type G