I, too, am interested in a 123 charger for my Streamlight.
Batteries @ $7.00 each is ridiculous.
Problem with Streamlight (I have some) is that they state "no rechargeables" in their warranty, much like Surefire. I believe mostly because RCR123s had been a bit twitchy on keeping a steady voltage. I was just wondering if newer ones had gotten better.
People seem to be using them in Fenix lights, but I don't have one of those. I was mostly looking at them both for my rangefinder, and because I was doing my year-end checks of bugout bags and stuff, also for use in my MSR MIOX and Steripen water purifiers.