As a regular CPF reader/tester (the largest flashlight forum on the net), I was bummed to hear that David decide to sell Foursevens a few years ago. Then, I was glad to hear that they were purchased UNTIL I found out who purchased them. As someone here already opined, the company who purchased for sevens is going to do nothing with the products other than just keep making them however David et al built em.
Anyway- these suckers do indeed run clean off 10440 cells, but, one must be careful to watch those High Mode runtimes! I find my Preon 1 puts out an acceptable amount of brightness at medium level rather than high.
Decent light, although I'm not so sure as much of one at the 40$ "on sale" price point here. For example, I recently purchased a "cheapo" AAA off brand Chinese AAA light recently for 10$ off Amazon with a reverse clicky switch that's as good as this light and, even moreso when I ran 10440s in it.
The bottom line with websites like this, that don't cater to we flash o holic's it's better to do some homework online before you start making your flashlight purchases here. I'm not saying there aren't good deals here, because they are- but, you HAVE to be able to read through the BS sometimes to figure out what you're buying here. Caveat Emptor kids....