Well, how long it should last and how long it actually lasts really depends on you. What the vendors say are really the best scenarios to the
vaping world - a mild vaper. Definitely what you got was most likely way overpriced, hate to say it, but yes. That is just the way it works - those dang kiosks! But hey, it got you started into vaping, correct?
You will get a lot of recommendations here, after my post....especially about skipping all the small analog-looking ecigs and going straight to an EGO or RIVA type PV. Well, I'm not going to do that. (I've been there, done that)
I started small (analog looking), went to all types 808, 510's, etc...on to RIVA (cheap), then EGO (better quality), now after over a year of vaping guess what? I'm tired of dripping, trying all the fancy attys, tanks, cartomizer versions.
A couple weeks ago I made the switch back to the new regulated 808 style (analog looking) ecig from Smokeless Image (Volt) and I am loving it. It is nice to just find that one vendor I can use to get the small footprint ecigs with a charging case that lasts me all day with 2 batteries (and these are the small 65mm cig size). When one runs out, I make the switch in my PCC and bam! It starts charging while I use the other. By the time this one runs out, the other is fully charged.
Such a great device to make the transition easy off of analogs with no worry about trying this brand or this type. How about a tank? How about a Mod? Now I'm not saying these are bad devices, all are great in their own way. Just right now YOU NEED to focus on quitting analogs and having complete satisfaction is key. Read up on everything in the forum over time, just don't overwhelm yourself...remain focused.
Smokeless Image's Volt will take you there. And I must say I cannot speak enough about their customer service, the best around.
Thanks for reading.
-VA Bill
EDIT: OF course I forgot to mention their outstanding prices compared to the competitors. You have to see for yourself. And they offer standard 1st class shipping as an option, as all vendors should do.
Also, most important missed a couple points from your post...a typical cartomizer can hold around 20 drops of eliquid, some more some less. Just pull that end-cap off and drip into the filler material until it soaks up.
Depending on what you purchased, like others asked already, the battery (if a 510) may last 45 min to an hour of vaping - maybe a little longer if you are a light vaper. The 808 style will get you (depending on battery size) a small one heaving vaping 2 hours, light vaping 4 hours...larger batteries even longer. Not knowing the model makes it difficult to rate your model.