Nolan, this article isn't about the specifics/features of the Cinema Camera itself, per se, but how it can compare in chromakey production workflows as compared to cameras costing a great deal more than it. For specifics on camera features, I'd suggest reading my previous article here on the Cow:
http://magazine.creativecow.net/article/is-the-new-blackmagic-cinema-camera...
But to answer your question, yes, the battery is integrated into the body of the camera. But there is also a DC tap for external power. I look at it like any other video camera that requires external power (which I even do with our larger HDSLR rigs). The internal battery can be thought of as a backup source, rather than a primary source. I for one will never rely on the internal battery and will continue to use external power like we do with all our cameras, again, including HDSLR.
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