I have a Mini AA, which I'm very happy with.

I carry it on my keyring as an EDC light.

Today I dropped it on the concrete ground from about waist height.

Since then the head rattles when shaken, and when on medium strength beam there is a loud audible rattle-like-buzz from emitted from the head.

I'm not going to try to return it, as dropping it was user error, but can anyone suggest what I could do to prevent whatever is rattling inside the head from rattling? it's like something has come loose inside the head. The light, including all the functions still work.

How does the head disassemble? I know it will void the warranty if I do, but how is it done? Ta!