Air passengers at Hong Kong International Airport were surprised to discover a new rule limiting the number of power banks they could carry to two, with few visible reminder signs.

Air passengers departing from Hong Kong have said they were unaware of a new rule limiting the number of power banks they could carry to two, with few reminder signs visible at the airport on the first day of its enforcement on Sunday. Hong Kong International Airport announced on Saturday night that departing passengers were restricted to carrying no more than two power banks. Citing new regulations from the International Civil Aviation Organization (ICAO), the Airport Authority said the global....