I haven't done any tests on them, don't really have the capability, but I have two of those and they do perform well. At least as well as the one AW IMR 18490 I have and better than another vendor-branded 18500 in my stash. I'm sure the mAh rating is overstated, as I do get less run time on those than I do on my 1600mAh 18650s, but that seems to be fairly common practice with battery manufacturers (though in their defense, they do measure that figure under different conditions than what we put them
through)