The so-called VV Egos are not really variable voltage. Real variable voltage goes at minimum from 3.7v to 5v, continuously or in .5 volt increments, and some go 3v to 6v or 7v. The "VV" Egos usually have 3 or 4 (Gotvapes) steps which are basically just stepping down the battery's natural voltage. 3.2v is like what a slim 510 has. 3.7v is what most of what I
vape is. The 4.2v I've heard is closer to 3.9v. I have one of the earlier 3-voltage ones from Gotvapes (slightly different from what Janty is showing) and with mine the voltage seems to weaken (as I expected) the closer you get to the end of the charge. Mine's OK but no real improvement over my 1/2 the cost 3.7v Riva 510 kit (the Liberty-Fliights.com Riva 510 kits are 3.7v and a whole 2-battery kit can be had for the price of the one battery you linked with the 20% discount this link gives 20% off your whole order! ).
However 3.7 or 3.9 is higher than you will ever get out of a normal Ego - they run around 3.4v. So the multi-voltage battery will give you more warmth than a normal Ego and a small bit of flexibility. NOTE - I have never tried the one Janty is showing - that's a different style from the clone 3-stage and 4-stage Egos at Gotvapes.
