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There are ways to properly drain and/or dispose of li-ion batteries. I'd suggest looking more into it online (I'm not really qualified to explain these things in detail lol)
Never realized that level of charge dictates whether Li batteries self-combust or not. Thank you! Combustions with getting wet… is that also charge related?
TL;DR uncontrolled release of stored energy can be potentially dangerous. Doesn't really matter how the energy is stored. It may be chemical as in these batteries. It may be compressed gasses. It may be tightly coiled springs. Doesn't matter. And the more energy stored, the greater the potential damage. And since we need stored energy in order to do the work we desire, there's really nothing we can do about it.
The limit is 100w. We could have laptops which last a lot longer, but instead are limited to that 100w max capacity or the laptop would essentially be banned from sale. One of the consequences of no removable batteries anymore.