Found this link not too long ago that let's you compare the battery life of 18650's at different amps. You'll still have to do research on what you feel comfortable using as far as safety but definitely a good starting point. I tend to use the AW IMR 200mah as my baseline since they have never steered me wrong. mods, if there is a better forum to put this in please feel free to move it.
Battery test-review 18650 comparator
Battery test-review 18650 comparator
