Starting October 1, Emirates will prohibit the use of power banks during flights, the airline has officially confirmed. While passengers are still allowed to bring one power bank onboard, it must meet specific conditions. The airline specified that each flyer can bring one power bank that is under 100 Watt hours to the cabin. Here's why Emirates making this change. Lithium-ion batteries — the type used in most power banks — store energy by moving lithium ions through an electrolyte solution between two electrodes. And under certain conditions, like overcharging or physical damage, these batteries can overheat. According to Emirates,...