SEOUL -- All South Korean passenger airlines have completely banned the in-flight use of power banks amid growing safety concerns following a series of battery-related fire incidents, industry sources said Friday.On Thursday, T'way Air Co. announced it will prohibit passengers from charging smartphones and other electronic devices with portable power banks during flights beginning Monday.With the decision, T'way Air became the last of the country's 11 passenger airlines to adopt the measure, according to the sources.Low-cost carrier Eastar Jet Co. was the first South Korean airline to ban …READ FULL ARTICLE