So I'm investigating kr-808s, but I'm getting confused by the fact that there seem to be a ton of different models that all have kr-808 in their model name, and I'm not sure of the differences between them. The KR808D-1 seems to be the most talked about, but it's too big for my taste - I want an e-cig that can "pass" as an analog (I know, I know, everyone says I'm going to grow out of that phase eventually, but I haven't yet). I've seen pics of other KR808s that seem to be smaller, super-minis, but I'm not sure what their model numbers are or where to buy them. Are the smaller version 808s just as good as the 808D-1 (in terms of flavor, throat hit) just with shorter battery life? Or are they weaker? Are parts interchangeable between the various 808 models?
Kr808 and Kr808D-1 are the same model. Most people just shorten the name for simplicity.
The names you see are just branding, and sometimes a different paint job - but they are all the same model.
The reason that people recommend against super-mini's is because they don't work well. They have less power, bad battery life (30min to an hour for most people), short cart life (we're talking 5-10 minutes for a moderate vaper), and most smokers find that they simply aren't good enough for them to quit cigarettes.
I understand the desire for a small device, but if it doesn't work, what is the point of it? You want it to work, right?
If you go to Vapor4Life.com, they do sell "shorty" batteries. What they sell, the Vapor King, is a branded Kr808. The shorty battery will obviously cut down on battery life, but the power remains the same. This is your best bet for something "smaller."
It will still be slightly thicker than a cig, and about the length of a 100. But if you try to go any smaller, you will be disappointed.