The Efest 18500s aren't too bad, though they are a few mm longer than the AW. I have one of those and also a few off-brand 18500s and 18350s, but over the long run the AWs in those two sizes have served me the best. I've used them more often and they're still going strong, while most of the off-brand ones are all starting to show noticeable loss of performance or have gone off to battery heaven already
