I did a little dissecting because the dripping method was not working all that great for me. I found that right thought the battery end is a little cup with wires connected to it. There is no hole in the bottom of the cup...so the cup fills up, covering all the electrical wires, till it reaches the hole that is located on the side of this cup.
Once this cup fills up and the eLiquid goes through the hole on the side, it then can either go into the air passage or soaks the atomizer and some of the filling.
I've taken apart 5 cartos and tested the ability for the stuffing to hold liquid. It seems that the stuffing itself can only absorb .6ml of liquid. BUT if you only fill it with .6ml of liquid, then the cartomizer gives off a dry burn.
So I assume that if you put .9ml in the well...that you saturate both the filling and the atomizer wick along with some excess liquid in the well and air hole.
Included is a diagram I did illustration what happens when you drip through the battery end...my worry is that you may be saturation some of the stuffing and the atomizer wick...but not all of the stuffing.
Anyway...just figured I would share.
Hey SF, interesting write up. I've read it about ten times, and in the midst of that I have examined the metal tip of one of the Joye cartos, with the plastic body or barrel removed. Either I'm not understanding what you are trying to say, or you are partially wrong. If you hold the metal tip up to a light, you can see the light through the hole in the bottom of the "cup" you describe. Exploring with a simple paper clip, I can pass the clip through this hole that you say isn't there. Again, maybe I'm not understanding where you say this hole is or isn't. You can also see that there is a semi-porous area underneath the electrical elements. It's difficult to tell whether liquid passes through this, but I think it does. Otherwise, it passes through the hole in the bottom, which is off to the side of the bottom, but it is not "on the side".
When you drip liquid through the hole in the tip, it passes through the hole in the bottom and into the well where the fiber fill is located. While it's true a few drops may stray into the air hole leading to the mouthpiece, the same thing happens if you overfill it using a syringe through the fill port. Once that well is full, the liquid has to go somewhere. If you overfill from the syringe fill port, you can watch the liquid start to drip through the hole in the metal tip. If you overfill through the metal tip, you can watch it drip out the mouthpiece. Same difference. And it doesn't matter which end you fill, if you overfill, the atomizer will get wet.
The sands of the hourglass flow equally from one end to the other, no matter which end is up.
I totally disagree with your statement that putting .6ml in the cartomizer results in a dry burn. That makes no sense at all to me. I frequently refill my carto throughout the day with as little as 4 drops, and it vapes fine. And as for implying that dripping into the battery hole doesn't completely saturate the filler, I have seen the evidence clearly that this is not the case. It completely saturates it if you insist on getting .9ml in there. I consider that overfilling. I don't really care whether the marketing about holding .9ml is accurate or not.
I do agree with you that they should not have made the body out of plastic. But after all, they are intended to be disposable.
I'm not trying to sell anyone on changing brands of cartomizers or e-cigs. That's an individual choice. My only contention is that the arguments against filling this brand of cartomizer from the metal tip seem weird. One only has to try it see it works just fine. If people don't want to do it, that's their business and I don't care.
