I received an email about this from Cherryvapes engineer ,
"The advantage of putting it on the -ve end of the battery is that the metal tube is usually connected
to the -ve terminal, so isolating it (with the VapeSafe) is safer. But you can put it on the +ve end too, if that's
more convenient, it's just not AS safe as putting it on the -ve terminal.
So it's more safe to put it on the -ve terminal (and it will catch a short on the +ve terminal just as
well), and we recommend that, but if you really want you can put it on the +ve terminal."
I would think the VapeSafe on the + would catch all shorts,on the - would catch all shorts except between a short between the battery and tube.That would just bypass the vapesafe,right?