Chain vaping seems to be most common among those who've recently quit smoking; at first, I rarely put mine down for even 5 minutes -- I took a hit everytime I even thought about a cigarette -- I never let it that thought progress to anything stronger, like a craving.
As someone pointed out, with a decent regulated mod, the battery isn't really going to be a problem, unless it's just defective. However the atty might be a problem if the wick doesn't have time to wick up more liquid before you take the next hit, causing a dry hit, which is just nasty. Thicker liquids are more prone to causing this sort of problem. Primer hits -- taking a hit without pressing the button -- are a good way to prevent that, but be careful you don't flood it, or you may get juice in your mouth, also nasty.
I've found that as time goes by, longer and longer since I last smoked, I'm a lot calmer about vaping now; I may take 3-4 hits in a row, but then I set it down, maybe for 10-30 minutes, depending on what I'm doing. I even do that while riding/driving in a vehicle or watching TV. When riding in a vehicle, I often keep it in my hand, but don't use it very often; I just prefer to hold it so I'm in a control of it, since I don't have a "fixed" place for it, except my purse, and I don't want it to turn into a heavy missile in the event of a sudden stop or collision.
The only other problem with chainvaping, I've found, is that you tend to go "tongue dead" to the flavor of your vape, the more often you vape it -- I may take 3-4 hits, but never more, because after about 4, I can't really taste it, so I set it down. I'll have more, whenever I next think of it, but if I'm concentrating on something or busy, that might be a while. Then when I do pick it back up and have a vape, I can really taste it, and it has a good TH.
Andria