Scientists have announced the discovery of a material which could some day become the heart of a "battery of the future." By subjecting a common crystal mineral normally used to etch silicon conductors to gigantic pressures, they created a new substance which chemically stored all that energy in the bonds used to create it.

Me, I see two problems: 1) diamond anvils don't sound cheep, and the process required to produce the stuff doesn't sound very fast, and 2) getting energy out of something this power-dense without it getting all explode-y is going to be a neat trick. Still, it does seem to have potential.