BBQ Future2 Outlet Universal Ignitor AAA Battery Push Button Igniter for Charbroil, Kenmore, Broil King, Broil-Mate, Grillmate, Gas Grill

What is the width of the insertion ? I'm looking for about 5/8's, just a little smaller than 3/4's.

Does anyone know the exact diameter of the battery tube? Someone above noted "These are pretty universal, it should fit.", but that's not an answer.