Some time ago there was a thread about rechargeable CR 123 batteries, especially for use with the R1C1, SU 800 and SB-200s. There are not a whole lot of choices. Tenergy make 750mah and 900mah versions. I have had 4 of the 900mah's for a year or so and they seem to work pretty well but need to be changed more often than the 1400mah disposables. Price has also been an issue.
This is a pretty good price, even if it were only the batteries. Considering the slow recharge time of these, the 4 battery charger will also come in handy. Previously I had only seen 2 battery units. Since I use a R1C1 with a third SB-200, this will make keeping up use easier.
#1. "RE: Rechargable CR123 Batteries" In response to Reply # 0
I have been using the Tenergy rechargable Li-ion 123A batteries for a few years now and they seem to hold their charge well over time. There was only one capacity of battery available when I bought them at www.batteryjunction.com and I don't remember the ah rating off the top of my head though they are light blue in color.
The Eneloop's (Ni Mh) use a different chemistry than the Tenergy (Li-ion) which usually hold a charge quite well over time.