beck means well, but he's such a guru I'm not sure he remembers having to piece all this stuff together! (Just poking fun, beck's awesome)
Thankfully, our resident battery safety expert, Baditude (who's on a bit of a hiatus, sadly) has a very nice blog post explaining all these technical terms, and how they fit together.
http://www.e-cigarette-forum.com/forum/blogs/baditude/6293-14-ohms-law-dummies-vapers.html
It will take some time to sink in, but look it over. Keep asking questions, we'll get it all sorted out
ETA: As far as whether a device "steps down", or lets you turn the power down significantly, that will vary between devices. There are just so many out there, and so many different kinds of questions worth asking, that there is no central repository that compares everything, side-by-side. Or, for that matter, spec sheets that list everything in a very user-friendly way. Typically you've either got to know the jargon and know what you want, or seek out reviews, or dedicated threads here on ECF.
Thankfully, our resident battery safety expert, Baditude (who's on a bit of a hiatus, sadly) has a very nice blog post explaining all these technical terms, and how they fit together.
http://www.e-cigarette-forum.com/forum/blogs/baditude/6293-14-ohms-law-dummies-vapers.html
It will take some time to sink in, but look it over. Keep asking questions, we'll get it all sorted out
ETA: As far as whether a device "steps down", or lets you turn the power down significantly, that will vary between devices. There are just so many out there, and so many different kinds of questions worth asking, that there is no central repository that compares everything, side-by-side. Or, for that matter, spec sheets that list everything in a very user-friendly way. Typically you've either got to know the jargon and know what you want, or seek out reviews, or dedicated threads here on ECF.
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