With the Vivi Nova kit ok I'm a bit confused I have the variable V on the bottom but what is the max that the Vivi nova can handle without damaging it ?
Usually the vivi novas are prebuilt with the 2.4ohm set up, I think, and the spinner doesn't go above 4.8v, which should be fine, though depending on the juice, it could taste burnt at the higher end, in which case, just dial it down to your preference.