That is a boat load of energy in a small space. Remember the compaq laptop computers that would explode? Scale that up a thousand times!
However, I hope that they can make a battery with that great of a power density that is safe. Batteries have been the weak link in electrical powered cars.
Yes, it is. Its like packing the charge from the battery of a KW highway tractor into a battery the size of a D cell.
"However, I hope that they can make a battery with that great of a power density that is safe."
Possibly a catalyst can be found that sufficiently regulates the available discharge rate down to the application's required level.
There seems to be a lot of confusion here about whether the energy density is being increased or the number of cycles of discharge - recharge.
The objective is to do both of course.