To pick up where Carrot left off...
CPF is a unique place.
It does NOT represent the average consumer but instead the enthusiast/geek/"flashaholic".
The first thing that strikes most newcomers here is all of this crazy talk about various battery numerology. e.g. 14500, 17670, 18500, etc.
Who the f*** talks about batteries like that??? Geeks, that who.
NONE of those batteries were designed for the public consumer because of the hazards and difficulties with charging.
You can't just go into a store and pick these cells up.
Why do you think that is?
Because lawyers/solicitors would have a friggin' hay-day suing everybody in sight the first time somebody had a mishap!
So, WHY would you expect a Major manufacturer to cater to this desire when it represents such a small niche of the market???
...and with the downside of increased litigation!
Now the AA nonsense.
Surefire pioneered the high performance flashlight market for one simple reason.
The CR123A battery.
No battery, up to that time, could pack that kind of energy density into such a small package.
Hotwires, in order to be bright, need gobs of current. You couldn't get that without a CR123A lithium cell.
Surefire seized on this opportunity to create a powerful, compact flashlight and the rest is history.
Now, until only recently with the advent of Energizer's L91, could an AA format compete.
Alkaline batteries (think Joe Public again) were never designed to support high drains and with more and more electronic gadgets coming on the market it was only natural that a higher performing, commonly sized cell came along. In steps Energizer.
L91's are virtually the same, performance wise, as a 123 so once again, WHY would/should Surefire re-tool/re-engineer/re-market just because a competitor came up with a new battery? Flashlights are a business people. Step out of your egocentric box and look at it from their perspective.