Not to be picky, I just wanted to say it in case you didn't know:
When you say 'cart' around here, like in other threads, you might give people the impression that you're talking about cartridges (for an atty, old school), instead of cartomizers. That's why, to make the distinction, everyone else said 'carto'.
Also, if you have an automatic battery (meaning no button), make sure you don't get liquid in it from the carto. When you first fill it, take it off the battery until you know the carto isn't overfilled. When you get the hang of it, you can top it off with it still connected to your battery, because you'll know how to fill them and when to stop. I think most of us do it this way, the easy way.
But the first fill, take it off the battery and put on paper towel. Watch the filler material as you fill, then you will know what it looks like when full. Count the drops if you want to know the carto's capacity. It's full when you put a drop in, and a drop comes out the bottom.
