The spring at the bottom of the laser, where you put in the batterie, it has fallen and there is no more waranty, yes, it is a wickedlaser..... anyone that could help ?
These strings can usually be soldered back using a normal soldering iron and normal solder intended for electronics (i.e. with a flux/resin core).
I dont think the springs are made of steel at all, as that is virtually impossible to solder without using agressive flux or pre-treatment with rather nasty chemicals. I've never had a problem soldering them with regular electronics solder.