Faulty design or manufacturing of a device or replacing its battery can cause a failure in the separator between the anode and cathode, allowing them to touch and overheat the battery
She says its much more popular now and blames advertising, which she says is everywhere we go in stores, in kiosks, on every corner, you can see a lot there
Gonzales RA, Job MO, Doyon WM
A 2020 article in Fire Technology noted that "the fire risk in a spacecraft is more challenging than most terrestrial locations due to inevitable use of polymers and potential ignition sources in cramped quarters, limited resources for fire response, and limited evacuation strategy." Partly for those reasons, smoking is prohibited on the International Space Station, and it was not allowed on the Apollo moon missions either
The frequency and nature of that harm, however, is highly contested