Brokkr

As stated by another user, Wh is not a good metric for batteries because it will change depending on the load (voltage and current).

mAh is a strange unit, but it is the amount of stored charge (as in Coulombs) which does not depend on the load, so it makes sense to rate the capacity by this metric.

The “willingly” makes the difference there. That changes it from negligence to intentional, and those are legally distinct.

If Amazon, or another marketplace, isn’t aware of the danger of a product sold by a vendor on their platform, it’s not clear if Amazon, or the market provider, is responsible. Amazon is arguing that they aren’t, but I don’t know enough of the law to say if that is a settled question.