I currently own two itaste vv. My silver one works fine with the tank giving me more issues then anything, sometimes but i get thme resolved quickly. My black one will not give me the results im looking for. It doesn't give enough vapor and i tend to suck on it more for a lot less vaper. I have them set on the exact same settings and i normally switch the tanks between the two batteries. I have noticed that from my ohms on my silver it reads and 1.9 and on the black it reads a 2.1 for a atomizer ohms of 1.8. i have learned as the ohms go up that means that the atomizer is going bad but i don't think that is the problem here. Any suggestions on what could be wrong with my black one. i have had to take it apart a few times and put the wires back in the correct spots and sorts but this last time that was not the issue. Not sure whats wrong. They are the exact same battery.