[tristanj]

Look up Air Busan Flight 391, a power bank in someone's carryon caused the entire plane to burn down in 5 minutes. The airplane (an Airbus A321) was destroyed. The only reason there was not total loss of life was because the plane hadn't taken off yet.

https://en.wikipedia.org/wiki/Air_Busan_Flight_391

[ranger_danger]

This could happen with any battery-powered device though. But I don't see ICAO or FAA banning e.g. laptops any time soon, even though they may carry more energy than a single power bank.

[Blackthorn]

Have you seen what passes for quality on the random power banks sold by Amazon?

[markdown]

Random power banks are about the same quality as random USB drives.

[NetMageSCW]

Fortunately random USB drives are unlikely to catch fire.