So I've been really into smoketech duel coil carto tanks recently. I've been using them on a couple ego twists, and normally I have it set at 4.0 volts. Tonight I turned up the voltage all the way to 4.8 volts and I really like it. It doesn't taste burn't at all, but I'm concerned that I'm going to damage something. These things are standard resistance carto's. Is 4.8 too high? Will it shorten the life of the carto? I'm a frequent view of grimmgreens videos and it seems like he's always rocking everything around 5 volts. Even with low res stuff. Any insight to this would be helpful.