the "label" is printed on film then just wrapped around so you can have anything you want on it, the white bits of your image are transparent so it shows as the aluminium tube, nice and silvery
The voltage is currently 3.7v on a 14500 but I think that means you can fit 2 of those smaller bats in that make it 6v? not sure about that though, This one has an LED in it so that would have to be omitted for a 6v (I only put an led in it so I can see it's working ) and I guess the tactile switch would have to be tested to see how it performs over time on 6v, I've used these little switches for many mods and have had no probs but they were all 3.7v
The Carto is an E2 R3 XL some love em some hate um, I'm the one that loves um!