I already have a couple of spinners. Wondering about VV/VW?
The iTaste VV v3 is a VV/VW device. Probably about the same size as your spinners, can be used as a passthru (used while charging), uses a standard micro USB cable to charge, and is an all around decent little device. I've used mine nearly to death and it's starting to come apart, but I think with a bit of epoxy it'll keep going for quite some time. It's my preferred travelling device, because I can charge and use it while driving, and have a full 800 MAH whenever I get where I'm going.
The only downside is the VW only goes from 6 to 11, so if you find out you like less than 6 or more than 11, then that's a buzzkill. I'm usually pretty happy between 6 and 8 though, so I love it. Just wish it was a little more sturdy.