Hello, just bought a SMOK xCube II today and 2 Efest IMR 18650 3000mah 35amp batteries. Looked around for a bit, and someone said that if your mod ever shorts out with these batteries in them, they can possible explode or just release a tremendous amount of heat. Is this true? If so, to what extent is the "danger" of using IMR batteries. My friend uses the same setup and they say that they've never had an issue with the batteries/shorting/overcharging. Thanks!