cheers guys more confused now but informed confused!!! looks like will have to look at buying separate as well now,as new to this will have to look at how all the bits come together, but 48 now and smoked since 8 so anything thanks works +++
Evan, Borescoped and pufZeppelin have good suggestions. Realize when buying a PV 100 mah= approx 1 hour of vaping. Most begin with a set voltage PV and eventually move up to a VV/ variable voltage PV...maybe just save yourself some $$ and buy a Spinner or Twist. I own both and prefer the Spinner cuz the voltage markings are more visible and has a wider knurled dial that is easy to turn.
Twist Dial
Spinner Dial

I also own the Vamo and it's a fantastic PV for the price but quite large for out and about. I use the Vamo at home and the Spinner when out.
Basically when you buy a PV these are the parts:
Battery (Mods such as the Vamo use separate batteries and the Vamo is a tube into which we put the battery) whereas eGo. Spinners and Twists are PV in which the battery is the PV- once the battery dies out after 250-300 recharges it must be replaced.
Juice delivery system (holds and vaporizes the juice). Clearomizers are available in which we can inexpensively and easily change the heating coil and wick.
Of course the above PVs need chargers also.