I had a surefire cr123 in my light and was working it started to die, stepped down i continued working as it is a nightly thing to go through 1-2 batteries. Than the light started to flicker off and on as if a bad connection. I disassembled it cleaned the connections and installed a new battery issue went away except for a faint flicker that you can see when on high. Is this normal? Or a issue i should bring up with ZL? Thanks -John