there's some many shit versions of the 4nine floating about that I cant give you specific information, BUT, in a perfect world ( and a correct 4nine)the magnets would not be part of the electrical path. the little disc/copper/delrin combo..the magnet should not sit proud on that,, and neither on the switch, so the magnets repel each other, but contact goes from switch--->floating magnet outer metal holder (sometimes it is copper) to battery.
THere's versions around where this isnt possible, and some you can fiddle, but that is what you should be aiming for.