With a regulated device, there are safety features that compensate for people unwilling to educate themselves about the dangers of stored energy in li-ion batteries. With that said, I've never heard of those batteries. Not saying I don't trust them, or they're not re-wrapped quality batts, but the consensus of the vaping population is that if a battery has the word "fire" in the brand, you should stay away.
Worst case scenario: Your batteries are not rated for the amp draw of your device, and they go into thermal runaway and catch fire while releasing toxic gasses and possibly causing burns to adjacent surfaces (hands/face/furniture/house/cat/dog/mother-in-law/etc)
Invest in quality batteries. Otherwise, I don't see a problem with the specs of your build. Super sub ohm builds require a lot of amperage to fire the wattage. Batteries are rated by amperage in the amount of energy they can produce safely. If you exceed the amperage rating, the battery can deteriorate in a violent manner. Be safe and use quality batts. Batteries are stored energy, just like a can of gasoline. If introduced to volatile conditions, either can explode. Ignorance is no excuse for the law of potentially explosive conditions.
