I've bench tested the cell out of an eGo 1000mAh battery. It's 13mm by 65mm. I read somewhere they use a higher drain chemistry on them. I had one putting out 20 Amps before it started gassing out. It has only about 50mΩ internal DC resistance. Pretty amazing actually. I would be more concerned about the electronics than I would the cell. Of course, the booster likely has current limitations as well. I'd be surprised it it can put out much over 10W.
I have some triple coil cartos and for me, they measured out to 5 ohms per coil or 1.7 Ohms. Of course, there's always some range of manufacturing tolerance so it's certainly possible other ones could measure out lower.