Like a doofus I bought the MTE P7 from DealExtreme but didn't order a battery. SO I called a few local places like RadioShack, Batteries Plus... and the guys have no idea what I'm talking about.

Are there any retail stores likely to have the 18650?

Can I substitute 2, CR123's as noted here?
http://www.allelectronics.com/make-a...SHLIGHT/1.html

Thanks