http://www.e-cigarette-forum.com/forum/altsmoke/46561-bb-news-information-updates.html
First post indicates 14500 or CR2's. CR2's are 3.0v each, running them in series gives you 6v. Actually, once the USB adapter is released for the BB, you'll be able to run either 3.7v, 5v or 6v on it. (3.7...