What are the new restrictions, and how do you calculate your device's power rating? We've got you covered with these tips before you travel. SINGAPORE: From Apr 15, passengers departing Singapore by air may only carry a maximum of two power banks. The move follows updated safety guidance issued by the International Civil Aviation Organization (ICAO) on Apr 2, tightening rules on the carriage and use of power banks on board aircraft. Previously, passengers could bring multiple power banks, as