"And what batteries would those be?
This light is rated at 493 lumens. If the light has a way to squeeze 700L, why isn't the manufacturer doing so?"
I'm too lazy to find the website where the testing was done, but the light is not rated at 493 lumens. Candlepowerforums maybe? There's a guy that does some ridiculously in-depth tests of a ton of flashlights. I wasn't trying to offend your Streamlight (which obviously sucks