Sorry can't help Jimlad, I've never used any of the ones that look like cigarettes. The researching I did before hand suggested they have really low battery life so I decided right off the bat to go with big batteries.
They aren't like the systems I'm used too so don't really know, but do they click into an atomizer? They look a bit like they should just click in to the atomizer which screws into the battery. Have a watch of this video at about 3 min in it shows the cartridge clicking onto the atomizer. http://www.youtube.com/watch?v=cIjOetowMZw I'm not 100% sure if this matches your model or not thou.
I guess with these the atomizer is built into the cart, so you just pop the end off and drip the liquid in around the edges. Did my first refil just now, all good
Battery should last the best part of a day, thats why you really need a spare so you can rotate them.
I prefer the smaller cig like ones they are a bit more descrete and portable.