Right, thanks (I actually didnt know they went that high).
Standard, non-IMR (Lithium Cobalt) batteries can handle approximately 2x their amp hour rating so 3100 mahs can handle about 6.2 amps. However, it takes a certain amount of amps to boost batteries from 3.7v up to 5 or 6 volts but...I don't know how many they use to do that.
IMR batteries are necessary for smaller batteries, but 18650s are sufficiently large to handle all but the most demanding combinations of high voltage, low resistance applications!
IMR 18650s are safe to a very high amp draw (like 20 amps) which make them pretty much foolproof.
Based on the way I vape, I go for the longer life which still gives me more wattage than I need - but to be safe I only use standard resistance cartos. If I used LR I could probably strain the battery by mistake if I set the voltage too high.