Well -- there is Vmod2 and VmodXL. The Vmod 2 is smaller and uses 14500 sized batteries. The Vmod XL uses an 18650 battery.
Both are sold "a la carte" and "premium". The only difference is the Premium includes a single bay charger and a battery.
If you have a charger and batteries get the "a la carte" version. Or, get the "a la carte" and pick up supplies elsewhere, like RTD.
Even though you get a sample with the kit, I suggest you pick up a pair of Hybrid Atty's as well -- I like the 2.0 ohms. Many like the 1.5ohms.