I have both a Janty Dura-C (aka Joye 510, Yenti, 510, 501) and a Janty Stick too. Each comes with it's own pros and it's own cons.
The Dura-C works well at my computer b/c of the USB PT and it's elegant in appearance when going out; however, the Janty Stick seems to be a bit more of a work horse and the battery life can be extended due to the larger batteries and the ability to change them out fairly easily. I use a quarter to make the initial twist on the battery cover then once the top is off the battery covering, I change out the battery (It's a blue one that come with the Janty Stick (actually, it came with 2 blue batteries). It appears as if the Janty Stick lasts longer when going out but it has it's downsides as well.
The Janty Stick can be USB PT'ed too but it's not like a standard PT. It's more of a charger than a PT but it works well as one. The Janty Stick is a bit bulky, considerably heavier, and it's tougher & can be someone painful for anyone with sensitive teeth when attempting to hold the Janty Stick between one's teeth for a few seconds to a minute or two when necessary to free up the hands. This is not a problem with the Dura-C/510/Joye 510/501, etc...
RE: Dura-C/510/Joye 510/501, I would recommend buying a PCC to recharge batteries. The PCC units are supposed to charge a battery for this unit at least 4 times; however, the PCC doesn't work with the new mega batteries. Those are too long to fit in the PCC and allow it to close. However, it is important to note there are PCC units that work with the manual standard sized batteries now. It has an opening on the inside area where the manual push-button will simply drop in without a hitch and it will allow plenty of space to not only drop the battery for charging but it allows the top to close without adding anything over the batt to keep it down so it can get a good charge. I believe I read that it takes about an hour to charge a 510/Dura-C/Dura/etc... battery - manual and automatic.
RE: Janty Stick can be recharged but it will require access to an outlet of some sort. The best wall adapter is here:
USB Dual Power Adapter . It has enough electric juice to run the USB chargers, more so than what a computer gives off and you can't beat the price given the quality and power it puts out. It's a Dual USB Charger that plugs into a wall outlet. I've been using it for a few weeks now and it works wonders. I tried a dual USB wall charger that come with my Nano Ipod (before I got the 80gig Classic for Christmas last year) but it simply didn't have the umph to do the job and do it right. This adapter listed above does and it comes highly recommended. I found the recommendations from various threads on the forum here.
I'm trying to buy a few extra batteries for each unit along with a few atomizers when I can to ensure I don't run out in case one of the two manage to crap out on me. I also bought one of the mega batteries for the Dura-C/510 model. This one has the LED light on the end. I'm not sure how I feel about the LED light though. Perhaps I am wrong but it seems to me that having the LED light on the end of a battery would do more harm than good as it has to have a battery source to light the LED and as such, that battery source would be best served going to the part of the battery that actually allows for vaping, not making a Christmas Tree Light about of the end of of my e-cig but that's just my opinion. Others may feel differently and if so, please state why. This is my first battery to come with an LED so I am not well-versed on the LED function and how much of the battery's resources the light takes.
I really hope what I've learned will help someone else out there.
BTW, which works best in the Janty Stick, the 801 atty or the 901? I've been using an 801 atty since the one that came with my Janty Stick crapped out on me. I'm going to try to clean it to see if this will make any difference. I hope so. I realize the wires in the bottom of the atty need to line up with the cartridge; hwr, I am having problems lining them up b/c I simply cannot see that far or that well and on some days I can't see at all. Others have been kind enough to help me with the carts and attys for the 510/Dura-C model and placement of the cart. To everyone on that, my sincerest thanks... If anyone has an idea about making it easier to set the cart without squishing the wiring in the bottom of the 801/901 atty for the Janty Stick, I'm all ears and will be ever so appreciative.
So far, these are great units with their own little quirks but equally nice PVs to order and use. Regular maintenance is important though including changing out the filler in the cartridge. I've switched completely over to poly fill versus fighting the fluval or buying new empty blank carts each time. I only buy carts when the ones I have begin to feel weak as if they are worn to the point of breaking with use.