You'd just have to machine a battery holder for the batteries, and the runtime would be pretty short, but otherwise yes.
The 2D/6AA option is a lot more pragmatic, that's the setup I use with my TLE-300. Battery holders are only two bucks (http://kaidomain.com/ProductDetails.aspx?ProductId=2723) and you can use regular NiMHs for guilt-free lumens.