Yes, max on my twist is 4.8v, paired with a 1.8 ohm atomizer it would generate a little more amps than the battery can handle. Since ego batteries are rated around 2.2amps, 4 volts is about as high as you want to go on a 1.8 ohm atty. Now, I've pushed them to their limits before, I used to use 1.5 ohms on a 5v box mod, cheap ultrafire batts that aren't rated any better. Just know you're wearing things down fast that way, more cost in the end.
As others say, the cig pack comparison doesn't work and is just a marketing thing. I smoked 30 marb lights a day and started at 12-18mg, was getting dizzy at first because I didn't want to put it down. You learn what you can handle. Eventually, I grew more tolerant and moved up to 24mg to stay satisfied, at that time I no longer needed to puff constantly and could set it down for 30 minutes then come back to it. It's all in how frequently you vape which decides what mg will reach your satisfaction zone, so my advice is start at medium strength then work from there. You're going to save a ton of money no matter what... until you go mod or juice crazy. Good luck.
Thank you for that! This is going to be cool. Save money and its healthier. I'll probably get addicted to it at first as well lol.