How long do 1100mAh batteries last on average? I doubt I'll be puffing on it all day, as I'm not a regular smoker to begin with.
Well, I can tell you I was a heavy smoker (2 packs a day, 40 cigarettes a day) and vape heavily also and a 1000mAh battery lasts a good six hours for me. A light vaper would get far, far more use out of a single charge than I do. Since you vape very lightly, you could easily get an entire day's worth of use out of a single charge.
Far as suppliers, I'm not familiar with the ones in Europe but we do have a section with registered vendors you can find here: Forum Suppliers. Most of the ones I see listed in Europe are in the UK but that'd still at least be closer than the US or China. I do see a lot of our European members talk about this one: Liberty Flights. I don't know anything about them myself. I just see them mentioned often. They're also a registered supplier here so they're a known vender with a good rep.
We also have a general European Forum you could check. Also--and I didn't know this myself until just now--a Dutch language section here: Nederlands. I would guess folks around there would know a great deal more than I would about local vendors.
So far my experience with the vape has been good, although it did give me a soar throat. I did smoke on it all day cause I liked the taste, but the vapor feels a bit harsh the next day (12mg nic) and I do feel some mucus buildup. I'm not sure if it's just because I'm not used to PG or that vaping itself is still irritating/harmful to the lungs (although not to the degree of smoking regular cigaretes).
A couple of things. I find Dekang to be harsh in general and really don't care for their liquids. I think they're PG heavy (80/20 usually I think?) and I, myself, find VG to be more "smooth". I usually use a 50/50 mix of the two now.
(PG and VG are the "base" liquids the nicotine and flavors are suspended in. And there's no "best" mix. It's a matter of personal preference. You have to try some different mixes, see what you like.)
Also, you being a very light smoker, you might want to go much lower on your nicotine level. Nicotine can be quit the irritant. I was a heavy smoker and had to lower my nicotine level to no more than 18mg and mostly use 6mg most of the day. Though I do vape quite a bit.
Still, PG can irritate the throat for some (does mine if it's over half the mix) and high nicotine definitely can. You could even try some liquids with no nicotine. Since you were such a light smoker. You may not need much nicotine at all. It may be more the "habit" of doing the whole smoking kind of "routine". You just have to try some different things and see what works for you. It's all highly personal.
The other thing to watch out for is when you smoke, you're used to drawing the smoke down into your lungs. Vaping is a more "shallow" inhale. As a smoker, I had a very deep, deep draw (barely exhaled any smoke... my lungs must be lumps of coal by now). I had to adjust to holding the vapor in mouth mouth more and exhaling through my nose. Especially because the vapor is water vapor. And lungs don't seem to like water. They get upset.