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.
My thought exactly. We’re talking enormous energy densities here.
Very exciting, but if that energy gets loose suddenly life in the immediate vicinity will be even more exciting!
At least in theory this won’t require as much additional electrical generating capacity as many think. If cars are recharged during presently low-use periods, much of the capacity can come from the more efficient use of peak capacity. This can easily be encouraged by having considerably lower rates for off-peak electricity use.
I also wonder how much these batteries will cost and how long they will last.