I began using a new E2 a few days ago. Didn't know what revision it was, but it has a black wrapper and the resistance measured 3.0Ω. All I did was take it out of the wrapper and filled it up according to the silly little instruction card. It took right at 1.5mg to fill it to the bottom of the cup. Since then, I have been vaping it at various voltages without any modifications. All voltage measurements were made under load while the cartomizer was in actual use. Most tests were made with the battery pointed down in order to monitor the actual wicking capabilities.
On a 510 battery, the taste was bad on the first vape and it didn't get much better until it was refilled. The taste was normal when refilled. Other than that, this particular example was good to excellent on all other tests. Most importantly, there were no leaks when used or stored in any position.
Most tests were done at 2.8, 3.1, and 3.7 volts. On each of these voltages, the taste did not change until the reservoir was vaped dry. As a matter of fact, at 2.8 volts the vapor dropped completely off before a taste change was noted. For a minute there, I thought the coil had burned out.
My juice begins to be bruised at anything over 3.7 volts at 3Ω. Therefore, I did not do any extensive tests above this voltage. At 4.2 volts, the wick does not run dry with a full reservoir or thereabouts, but I do not know if it will begin running dry before it is empty.
At 5 volts, I know that the wick runs dry with the reservoir level at about half, because that's where is was when I cranked the voltage up to there. The burn in the roof of my mouth was more like hot smoke than vapor. After a juice top off it was more like vapor than smoke, but the taste was so bad that it was difficult to tell what was what. At that point I began dripping with Nhaler Octane, which does well at this power. I suppose it would wick well enough with a full tank of this juice, but I wasn't insane enough to test it long enough to find out how far down the level would be before the wick began drying out. Some of you tough kids can go crazy if you want to with an insane amount of vapor and TH, but I'm old enough to use a little common sense.
After about 10 or 12 refills, the performance dropped off a good bit. I compared it with a Boge 510 Mega cartomizer from Nnaler. An A-B comparison between the two revealed that they performed about the same (I like the open draw of the Boge better). Therefore, it was time to rejuvenate the coil.
So up until this point, I did not know what version was being tested. I didn't find out until I removed the filler ring to burn off the coil. I could see right off that there was no shrink wrap on the top part of the cup, meaning that it has to be a .......ized version. A probe in the dark innards indicated that there may be a certain amount of polyfil down in there. I did not feel anything at the base to indicate hot glue or silicone.
After a dry burn, the performance was restored and it works like an E2 instead of a cartomizer. I am using it now with my custom made filler tip, which replaces all removable parts inside. This doesn't make it work any better. It just makes it a whole lot quicker and easier to refill.
If all of the .......ized versions worked as well as this one, then the only complaint I have is the nasty on the first fill up. As long as it works well and the taste is good, I don't care about what it looks like inside.
However, I will probably put this one aside for a while and test a full blown Revision 4. More than likely it will be a KR808 at about 3Ω resistance.