I have one of the inexpensive CVA bore lights and guess I'm getting what I deserve. I made the mistake of carrying it in my pocket most of a day recently and now it doesn't work. I don't now whether it turned on in my pocket killing the $3 battery or has bigger problems. It's a lousy design but for $6, what would one expect. Has anyone found a suitable "substitute" with perhaps a more definite on/off switch? Maybe an automotive or construction probe light or keychain light that will go down a .50 bore?