Does the actual product match the voltage description? I am trying to find one of these to use in my 6P, but it appears 2 RCR123's would be too much for this.
2xRCR123 (or even 2xCR123) would be too much for this one. I think your best option is to run this on 1x17670. I measured 700 mA at the tailcap on high with a slightly used AW17670 cell in my G2Z. You can estimate the runtime on a single RCR123 from this.