Sub tank mini with cool Fire iv

[Tyler oakes]

I have this mod that I just got, iv been using the subtank mini and love it. Recently had an I stick 30 watt and upgraded to the cool Fire iv. Is this a good battery with the sub tank mini? I had a coil that came with the sub tank mini and it was a .5 ohm occ kanger tech 15w-60w. Then it ran out and I had an extra coil laying around. It was a the same coil but 15w-30w. What is the difference between the 15-30 and the 15-60? I know you can have more watts but what does this mean? I purchased a 5 pack on fast tech and hopefully they are authentic, anyone buy from here? I bought the 15-60 watt. But with this 15-30 watt coil and the cool Fire iv being able to run at 40watts. What will happen if I run the 15-30 watt coil at 40watts on the cool Fire iv? Will it blow up? Lol. Will it just run out quicker? Are the new vertical coils better than the old ones? My battery says I'm at .61 ohms. Why isn't it at .5 like what the coil says? Also, why does the coil run up to 60 watts but my battery only runs up to 40 watts? Sorry a lot of questions,

 

[IMFire3605]

The 15-30watt OCC head is probably an older horizontal design where the 15-60watt heads are vertical coil design. If the airflow and wicking can keep up at 40watts I see no problem, but once you sense a burning hit, back it down to 35 then to 30 or so. The ratings on the coil heads are only guide lines. Many can use them above or below recommended specs, taste is subjective remember that.