Southwest said that requiring these chargers to be kept out in the open when they are being used will help because “in the rare event a lithium battery overheats or catches fire, quick access is critical and keeping power banks in plain sight allow for faster intervention and helps protect everyone onboard.”

The carrier will require passengers to keep lithium batteries visible while in use in order to allow flight crews to respond more quickly in case one catches fire.

Passengers on Southwest Airlines flights will soon be required to keep their portable chargers in plain sight while in use due to concerns about lithium-ion battery fires, The Associated Press reports.