LS and rechargeables...

[Reno]

I EDC an Arc LS (great light, BTW), and I favor the 123 batt pack for it, where pocketability is concerned. However, after prowling this forum, and some websites like www.batteriesamerica.com I'm beginning to lean toward rechargables as an EDC option (after all, my other 2 batt packs are collecting dust!!). Enough background; here are the questions----

-I understand a LiON AA kicks out 3.6v nominal. Is this a viable option for the LS, and if so, what kind of runtime am I looking at? Don't wanna fry her...

-I found some 2000mah AA cells at the aforementioned website. These are 1.2v, though. Will I sacrifice much brightness in comparison w/ alkalines or standard lithium cells, and what can I expect for runtime?

All this, in the knowledge that the Arc is regulated, and I might screw up the 'flat' discharge curve...

 

[Radiant]

Lets see... I don't think AA Lithium Ion batteries are really an option right now seeing as how the only place I can find them is in large quanties from some manufacturer in china and the fact that they are said to require strict charge/discharge control. Most Li-Ion packs for devices right now are a custom shape to fit only the products they are designed for so that your average person doesn't start a fire by trying to stick them in a normal charger.

As for the 2000mah Nimh cells, I would estimate that they should yeild somewhere around 3 hours of good light.