Cree led!!!

The Crees are in! Ok, so I have a question.
I really want to use this in my next saber.
I am using a 3.7 volt battery.
Do I need a resistor?

LED: http://www.thecustomsabershop.com/Gr...ova-P1000.aspx

Battery: http://www.thecustomsabershop.com/Li...dule-P672.aspx

It's probably a stupid question, but I need to ask...

I usually recommend a very minimal one just to protect the LED.

Ah thank you!
(I love this forum's response time XP)