I do a lot of filming on the go. And while I do have acess to laptops and whatnot I would like to have the versatility of my powermac G4 (more ports, PCI expansion and more rugged). I don't always have a place to plug it in though. I was thinking about turning it into more of a mobile station. My main problem is that is power first and formost. Does anyone know of a space efficient way to power a powermac G4 (preferably internally like a laptop battery). Something that might fit in the place of the current power supply.