MFLB battery cap on negative end?

Hey, whenever i use my MFLB i just put the battery cap on the negative end and it acts as a cushion for my thumb sort-of. It lights up and vapes good...but am i supposed to take the cap off completely?

It won't hurt anything on the negative end. When the wrapper is taken off the battery (by MFLB) the entire side of the battery becomes the negative end. The only reason we need the cap at all is to keep the positive button and the negative parts from touching the same piece of metal (together). I think sticking the cap on the end is a good idea. I don't know how many times I've dropped mine.