If someone could actually maybe point me to a good guide it would be helpful. What's so dangerous about these batteries I don't get it. I've had some odd batteries for things before but ppl seem to make a huge deal of these. I'll check out this mooch guy and if anyone has any other links.
Google "Mooch's Blog" and "Baditude's Blog" for current information on Lithium batteries for vaping.
The reason people say vaping batteries can be dangerous is because they can be dangerous (as in explode) if you are uninformed and don't practice safe battery habits.
When it comes to advanced mass marketed systems like cell phones and laptops and hybrid electric cars, the system designers of those products have taken appropriate steps to make them "safe" for uninformed end-user use. Purely mechanical unregulated ecig battery mods and uninformed end-users is a dicey proposition.
Most consumer battery operated devices are no where near the limit of the batterys operating limits. The high-end flashlights and ecigs and RCtoys come to mind as applications that really push the limits. With the RCtoys the device is physically far removed from the person so a mishap is inconsequential. With ecigs a mishap is literally in the persons face.
An 18650 Lithium-ion battery has the explosive power of an M-80 firecracker, or 1/4 stick of dynamite if it explodes. Not something you want to happen within inches of your face.