Joyetech eGo-T Mod 18650 2200mAh Battery - MyFreedomSmokes.com
I purchased one of these today and love it. Nice looking and a great bargain. One nice feature is that once the battery is installed, the unit can be recharged using a standard eGo charger. No need to remove the battery or buy a universal charger.
Another nice feature is that it can run in regulated or unregulated mode. Unregulated mode definitely hits harder. I also believe this is the lightest 18650 mod I have ever used.