And don't get me started on flour, not only it stores a ton of energy (50 grenades per kg) but it's also highly explosive! [1]
[1]: (only with the right air to flour ratio of course, but accident happen every once in a while: https://www.grupa-wolff.com/a-tragic-flour-explosion/)
The flour conditions of exploding are far more difficult to achieve than a LiIon battery conditions - orders of magnitude difference.
Neither does a NiMH battery. There's no link between vulnerability to external damage and ability to power a laptop.
In fact, there's no fundamental reason why we couldn't run our laptop on chocolate[1], just that it's very far away from current technology.
vs
A grenade releasing that as KINETIC energy into YOUR FACE over the span of LESS THAN A MILLISECOND and protected by a spring and a keychain ring.
Even if a lithium battery of that size experienced a critical failure right in your lap, you'd get away with a few scars and some serious but treatable burns. And I've only heard of one commercial product in the last 15 years that had serial critical battery failures...
Hopefully your laptop and hand grenade have radically different power discharge profiles.
Li battery fires are not unheard of, unfortunately, so the profiles may start to resemble sometimes.
Next, let's calculate the energy input required to heat a small cup of coffee and compare that to a hand grenade. (Hint: The coffee wins easily.) I wonder how many hand grenade equivalents a 10 minute lukewarm shower equates to?
Preferably yelling 'fire in the hole!' each time.
No. If it starts to smoke, you commit & push --force, then you throw it away.
a hand grenade typically releases 250kJ, or about 70Wh
you're asking for the equivalent of 1.5 grenades in your lap :)