Plane passengers who use wheelchairs will soon have to take one more step before boarding.

Southwest Airlines announced that anyone using a lithium-powered mobility device will have to remove the batteries and carry them into the cabin before checking in their wheelchair.

The new policy, taking effect on Sept. 25, puts Southwest in line with international safety standards and is part of a continued effort to reduce the risk of fire onboard.

“Lithium batteries have become one of the most common sources of smoke and fire incidents on aircraft,” Dave Hunt, Southwest’s vice president for safety and security, said in a message to employees on Sept. 12, USA Today reported .

“While these events are rare, quick access and visibility are critical to keeping everyone onboard safe. By taking pr

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