I don't know lol I just wanted to see the most powerful e-cig out there on the market so far.
Power is going to be about the same as long as it's unregulated. Usually around or just below 4.2v off the charger and the larger
batteries like 18650s will stay their longer before they start to drop off, smaller
batteries will drop off much faster. When you get into proprietary batteries many if not most like the Ego, 510, Volt(808) are regulated to a specific voltage so hey start and stay there until it's time to recharge. Some Riva batteries are unregulated the only ones I know for sure is the SE.
mah is different and is used as a measurement of how long the battery will last in between charges, a rule of thumb is the larger the battery the longer vape time you'll get in between charges.
Now if you get into mods that use 2 batteries, unregulated your looking at about 8.4ish volts fresh off the charger depending on the battery configuration used but I don't know any one that want to vape that high. You'd need a really high ohm atty.