Hey man
I have a few of these device. One is simply not enough.
I have a small pair of plyers to unscrew atty's.
I do not suggest you use carts.
Drip 3~5 drops at a time.
You also need a screwdriver with you for battery replacement.
Small coins do not work good because they hit the atty. (if you exchanging the battery and atty is screwed in)
Make sure you blow out your atty at least once a day if you are a heavy vaper. Liquid seems to get caught in the atty quite easily.
Have plenty of charged batteries.
Blackberry charger seems to get batteries charged faster than normal USB cable.
Janty stick is the perfect tool to vape discreetly, if you take one puff without primer puff, it should give you a nice throat hit without too much vapor. (i use it on planes)
I find the batteries lose their punch fairly soon, but others on the site tell me that their batteries deliver a good punch for hours.
So you need to decide this yourself.
If you're gonna use a few janty's i would get a USB squid.
It's one USB male going to 4 USB females.
I can charge my 4 janty's together off one USB port, or in the car.
I find the stick works better while plugged into a USB, rather than battery, but others on the site say it's the same.
Other advice :
Don't try any 6 volt systems..because the janty will suddenly lose it's appeal. (like you and the 510).
