These are actually what you want http://cgi.ebay.com/UltraFire-18650-3000mAh-Rechargeable-Battery-3-7V-red-/160620348822?pt=US_Batteries&hash=item2565b80596
You can find them cheaper out of hong kong, but for 2 bucks more its nice to have them quickly and in north america.
I'll buy them and...