'Perfect' Battery: Busted (Patreon)

If you could pack 10 times the energy into a battery, would that really be a sensible thing to do?  This would move the batterys energy up into the TNT/ thermite range.  Currently when lithium-ion batteries with 1/10th that energy fail, they can be pretty spectacular.  

Further we are currently pushing the limits of the lithium-ion battery technology, as should be evident with the samsung exploding batteries fiasco.

Because batteries cannot use their entire structure to store energy, and they have to produce electricity, not just heat, I really dont think there is much more space to safely pack energy into a battery, and that lithium-ion batteries are pretty much to electrical storage what octane is to car engines.