Walked in with a Maglight that had a flickering is...
Walked in with a Maglight that had a flickering issue. 5 minutes later they came back and said it was a battery issue - but the light is now working flawlessly. I'm just happy it works now, but I tried some old batteries I had already pulled out of it (batteries were the first thing I swapped to try and fix it) and it even works fine with old batteries now. Happy it works, but I don't think it was a battery issue.