I'm sure people have thought about it. Currently, spare lithium batteries are permitted in carry-on baggage only: https://www.faa.gov/newsroom/lithium-batteries

I'm sure people have thought about it. Currently, spare lithium batteries are permitted in carry-on baggage only: https://www.faa.gov/newsroom/lithium-batteries-baggage https://www.faa.gov/newsroom/lithium-batteries-baggage There is an exception for batteries installed in equipment for checked-in baggage if certain precautions are met. While the referenced article is a product advertisement, the FAA lists quite a few incidents: https://www.faa.gov/hazmat/resources/lithium_batteries/incidents https://www.faa.gov/hazmat/resources/lithium_batteries/incid... Maybe issues related to in-flight charging could be prevent by changing regulations. For the rest, it's probably easier to deal with events before they spiral out of control if they occur in the cabin.