For you rat zapper hijackers. I've used the rat zapper with the 4 AA batteries. Unfortunately not enough juice to kill the pack rats here.
A real good option for mice is the rat zapper with the rat tale.
http://www.northerntool.com/webapp/wcs/ ... _200319995
This little guy plugs into the rat zapper. Put the mouse eyes where you will see them. When the rat zapper trips the eyes flash, can't miss them.
I put the zapper in my attic once and had the rat tale hanging in the hallway. Within two days caught the whole family terrorizing my attic.