What do you mean the battery isn't sealed? Im not really sure what that means, but I can just get a 510 atomizer and it will work?
By unsealed I mean when you remove the carto from the battery there's a hole in the battery end. If you do use a atomizer and juice leaks down that hole into the battery it can short it out. Also go with what enchantedwonder had to say and do a google search for accessories for you pv type.