There seems to be a lot of confusion here...
Is it the atty? The tank? The carto? The battery?
There are 4 important things. Wick, coil, power and air. All need to be balanced to make the most of your Vape. Sure, the evods are nice tanks. The Kanger heads (usually) perform pretty well.
Air flow. Most of the tanks are vacuum based. To little airflow and you are getting dry hits, too much and you are gurgling.
Wick. You need a solid wicking material that will pull juice to the coil. Depending on the tank, the wick could be to thin causing flooding, or to thick so it cant keep up with the coil. The big difference between top and bottom coils are the wicks and the vacuum. It is my understanding that the vacuum is less important on a top coil, but you need to tilt and twist for efficient wicking when the tank gets low. Cotton doesn't wick as well as silica in the terms of actually pulling the juice to the coil (like burning a candle pulls the melted was to the flame), cotton relies more on the vacuum.
Tanks are more about airflow for bcc and wick to liquid exposure in top coil than anything else as far as functionality goes.
The coil needs to be able to keep up with the juice for the wick and airflow. It does this with power. Burning hotter or cooler...
Power is a hole lot of math. Not only watts/volts and ohms, but also amperage, output style (pulse width modulation), and a whole bunch of other things I don't quite understand.
Egos are designed to be a cheap Vape battery. Small, convenient, low budget, low maintenance, and low price! They do their job, and do it much better than a cigalike for a similar price imo. With that ease and low cost comes limitations. Lower amps, lower top power output, lower ability to step down the voltage.
That being said, protanks and such are built to do well on these batteries. Some do better than others of course, but imo you can't go wrong with a 1.8 coil in an evod on a 3.5v regulated, or vv, ego.
Sure, it may perform better on a apv (my mpt2s definitely do with the microcoils I put in them!), but I don't think most people but a mod to put a protank on... There is so much more to be had with rdas, rtas, and such...
Please feel free to correct me on any of this, I've picked up most of it in the last few months getting into rebuilding. The wicking and vacuum stuff I picked up this week after a few hard lessons with the fogger v3... I think I've got it down now though!
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