Hi - I apologize if I'm telling you something you already know, but an eGo battery has two different
threads: an external "eGo" threading and an internal 510 threading. I'm not sure the Smokeless Image Volt Spinner may have the external eGo threading, but it
does not have 510 threading. It has 808 threading.
Because you asked specifically about eGo threaded devices, you may already be aware of this, but I answered the way I did because I'm not sure what you mean by "tanks" that have eGo threading. Clearos, such as CE4/Stardust types and Kanger EVOD have eGo threading, but devices like Vivi Novas and Protanks, do not. If you want to use those products you will need an 808 to 510 adaptor. I'm posting this because a friend recently got a Vivi Nova and didn't understand why it wouldn't fit on her SI Volt Spinner.
There are cartomizers (to be used alone or punched for tanks) and tanks with 808 threading, but they don't have eGo threading:
KR808D-1 Tank Cartomizer
808 Single Coil XL Tank Cartomizer for the SmokTank XL
The EVOD clearo fits on eGo external threads:
http://www.discountvapers.com/kanger-evod-bottom-coil-clearomizer-black/
This is what eGo threading looks like:
As I said, I apologize if the SI Volt Spinner has the same external threads and that's what you are looking for, but I didn't want you to spend money on something that wouldn't fit.