Why do mobile batteries catch fire? Their use is prohibited aboard passenger aircraft, and even "outrageous" "Chinese batteries" have appeared

Mobile battery fires have been reported in multiple places in Japan, prompting stricter rules from the transport ministry for use and charging on passenger aircraft.

Investigators point to lithium-ion cell deterioration and overcharging as key causes of thermal runaway.

The article says safer next-generation batteries, including semi-solid and all-solid types, are being developed.

Consumers are advised to check for the PSE mark and a domestic business label when buying low-cost products.