1- what is the lifespan of an atomizer and how do you know when it has pooped out?
The lifespan of the atomizer is anywhere from DOA to months and months and months.
It also depends greatly on whether or not you want to deal with cleaning them.
Many people don't, and many people do, and you'll get ALL kinds of opinions.
If you clean them right they should definitely last longer.
Many people don't care, and find they last plenty long enough to not hassle with it.
But it turns out the very best way to clean them is actually no hassle whatsoever.
Check out this thread for detailed information...
http://www.e-cigarette-forum.com/fo...ion/97014-facts-about-cleaning-atomizers.html
2-what is the lifespan of the battery and how do you know when this has pooped out?
If you get one with a LED you will know it's dead because the light doesn't work.
Others will have to tell you how long they last because I switched to bigger batteries.
Mine were going strong after a few months before I made the switch though.