Originally Posted by Jason Lattimer
12kwh per kg ?!
Holly crap! That is some huge energy density. You could have a car a range of a few thousand miles.
They updated that to be the expected density of the batteries. To me, anything even remotely near that is awesome; hell, I'd be fine with 500wh/kg to start with.
Edit: One of the videos from 2009 (3 years ago) states a density of 1666wh/kg in a prototype cell. No idea what it is now...