Southwest Airlines is implementing a new safety policy, effective May 28, requiring passengers to keep portable phone chargers and power banks visible during flights when you're charging a device. The airline will prohibit the use of these devices while they're stored in carry-on bags or overhead bins,

Southwest Airlines is implementing a new policy requiring passengers to keep their portable chargers in plain sight during use due to concerns about lithium-ion battery fires.

Southwest says it will limit battery charging to devices that are easily visible, in case chargers catch fire.