Here's a run down that I hope answers all your questions:
These are not made by Joye or JSB but a very good reliable vendor.
The Atomizer appears the same as any other 510 atomizer with one difference, the usual metal ring that you see in say a Joye 510 atomizer is still there but it is covered with wire mesh for better liquid movement in this model.
The Atomizer screws on to and works on any other 510 battery or mod that I've tried it on.
The catridges fit tightly on any other model 510 that I've tried them on.
The Vapor production in indistinguishable from any other 510 Model that I've tried. I have these mixed in to my regular arsenal and I can't tell the difference from any other atty or battery.
The battery life is similiar to any other 510 model I've tried (about 2-3 hours of on/off vaping).
The battery charge time is about 2 hours from the usb charger.
The Portable model is has a slightly different battery(without stated recharge limitations) and the packaging is better.
I've been using a disposable atomizer for over two weeks now on anything that I have that is available and 'has a charge' and it's still going strong..
I've recharged several of the disposable batteries over 25 times now and still going strong.. YMMV
The Included usb charger is not for charging manual 510 batteries (no indicator to tell when charging is complete and the possibility of overcharge which is speculation on my part to be safe)
The auto battery will charge on a regular 510 AC charger.
When/if the battery dies you are still left with an atty, carts, usb charger and a battery connector
Please remember that these are marketed as a DISPOSABLE product and are not meant to replace a full 510 kit or to last a lifetime(as with all products), just as long as you can get them to last.
It's a hell of a value for under $10
Hoog
