Working again

I bought this light nearly a year ago. At some point it didn't work any more. It operates on these round flat batteries. I bought new ones, but alas, no light. That was several months ago. Yesterday, at my friend's house, I noticed hers was still working like a charm, even on the first set of batteries, which led me to believe mine must be broken down. One last try today to dismantle it twist and turn a bit and put it together again. And lo and behold, it's working again!