No. The Luxeon High-power LED operates at 9.45 volts and consumes up to 700mA.
Endor Rebel - Cool White, Tri-Emitter, 435 Lumens @ 700mA [7007-PWC-08-3]
You can wire regular LEDs in series sets in order to reduce the power wasted by resistors. The further you do that the more the array loses the ability to handle voltage drift. Something that's kind of important when you're powering them from a battery.