Can they be used, yes.
"Should" they be used is a different question and answer. These
batteries do not have good test results from the Candle Power forum's posters. A couple posts say that at 0.5 A discharge the actual capacity is half of the listed. (It would take a 7.4 Ohm atomizer to only get 0.5A.) And it appears that the discharge curves go to complete crap when the discharge is pushed above 1A, like from less than 3.7 Ohm atomizer, so for normal
vaping there will be voltage clipping and reduced battery lifetime.
These appear to be typical cheap Li-Ion 18650
batteries with misleading labeling. They will not hurt your Silver Bullet as long as the protection circuitry is operational, but using something less than 3.7 Ohms will strain that protection circuitry.