Thanks for the clarification, didn't know that. That is a cool design decision to work as such.
Trust me, I immediately posted to Luis and Stephen on facebook to ask them why they did that when I heard about it.
But, after calming down and thinking about it, it's actually pretty solid. The internal battery lasts two hours (John said his battery lasted two hours), and you could always just plug in a cheap drill battery or similar to charge it while you're walkin' around. Never have to turn the camera off, never have to take it off of a rig to switch it out.