Originally Posted by
DroneDog
Best wishes to the crew, this needs to be policed before a really major incident occurs, on check-in, maybe a requirement to demonstrate the laptop has only 20% or less battery reserve thru security before boarding, less stored energy should things go wrong.
Perhaps counter-intuitively, some lithium chemistry (lithium Ion, I believe) batteries can be at significant risk of catching fire when deeply discharged. Keeping most lithium chemistry batteries near to 50% is a safe level for them. It seems the danger does not tally closely with the remaining charge in the battery.
So it is not as simple as checking batteries are under 20% charged.