For the "FWIW" column:
I hot glued Radio Shack "D" cell holder ( 2 cell model) on back of my Active Eyes and wired in to battery compartment. The holder is almost same size as the motion sensor. I have standard "energizers" still powering Active Eye after about 16 months. The big battery holder has enough weight to allow the motion sensor to be set on a shelf, ground, bird feeder, window sill, etc. Now if only I could camouflage them a little better.