> Given that this would be upwards of 2000x higher density than a lithium battery, does that mean a 60Wh laptop battery has the explosive capacity of half a stick of TNT?
You actually can make a laptop battery explode with impressive force; but it's hard to trigger the detonation. In fact, the comparison with TNT is actually a pretty good one, because if you set fire to TNT it will just smolder and burn. It needs to be set off in a very specific way. But the higher you go on the energy scale, the more precarious the thermodynamic balance becomes, and the harder it becomes to keep a substance's chemical energy on the non-shattering-steel-and-tearing-off-limbs part of the scale.
> TL;DR: Comparing batteries to explosives is a bad idea. They're completely different. A battery isn't going to explode, it's going to burn.
But batteries already can and do explode - even though they are engineered not to. And at some level of energy density, a chain reaction becomes extremely hard to prevent. I agree that it might be pretty premature to talk about the characteristics of batteries made of unobtainium, but with 30x the chemical energy density of the best known sources, I think we can safely assume that you'd be nervous about having such a battery in your laptop or pocket.