If you don't have the site saved but have access to a calculator (who doesn't with phones these days?) the equation for a reg
mod is:
Wattage vaped at (max you will use, not the max power of the
mod) divided by number of
batteries / divided by battery cut off (I stick with 3.2 to be on the safe side though numerous mods cut off at 3.5-3.7) / divided by battery efficiency (I use 90% / 0.9).
So a dual cell mod vaped at 40W would be:
40 / 2 / 3.2 / 0.9 = 6.94 amps per battery
A three cell mod vaped at 100W:
100 / 3 / 3.2 / 0.9 = 11.57 amps per battery