Check it:

http://www.shop.wordupecig.com/Joye520-Joye520.htm;jsessionid=BF753694EF0EED3098B372EEEDE 45A23.qscstrfrnt02

Thoughts? Reviews?

Looks just like a Joye 510 to me. I hadn't heard of them making one called a 520.

Me either... Thought I'd ask the guru's here at VZ. That site sells a 510 as well.

Ooh...they have "copper" batteries...

The rumor is that it has twice the battery life and is a little thinner (8.6mm instead of 9.2mm) and longer (115 mm instead of 112mm) than the 510.

Here's a comparison picture:

http://thuillier.marc.free.fr/Ecigarette/IMG_8469MS.jpg

Can't tell the difference

It's subtle. You can sort of tell by looking at the reflection of light down the center of each - it's narrower on the one on the left. The real difference is supposed to be the "Mega" battery.

Oh. That's the mega battery? I thought someone said it was for the 510 but different thicknesses don't tend to allow for that.

Maybe the threads are the same size? On another forum someone was insistent that it was the same as their mega battery.

I'm not curious enough to somehow come up with the money to buy one at the moment. I've got numerous 510 batteries. Not one has died yet.

Same here. The battery seems to be the strong part of the 510. I wish I could find 901 batteries that were as consistent. That's part of what's in my theoretical order from mini - 901 batteries not listed on his site any more.

I haven't heard of them but it sounds interesting.. Will give it a try!

Can't tell the difference really. but here I would give another clue which also call 520, size118mm & 9.2mm, 300 puffs cartridge, do not know whether you are talking about this or not.
Supplier is Bauway tech. www.bauway.com

Joye 520 almost look similar to 510, it's cool and comes with lot of stuff. 520 is quite thinner than 510 and the battery life is longer . As such the difference between both is unnoticeable if not noticed properly.