Well... It finally happened to me... after two months of using this otherwise perfect little gem, the magnet on the bottom of the battery door came out... attached to the magnet on the bottom of
the mod.
Using a screwdriver, I shoved the magnet back into the housing on the door and so far, it seems to be "firmly" in place. Hopefully, it will stay put.
This is the one negative that I have with this mod.
I'm hoping that Jac Vapour will find a permanent solution to this problem that many who have either the 22 or 25mm device experience.