Southwest's new portable charger policy was vindicated after just 24 hours when a flight diverted due to a smoking battery pack

A Southwest Airlines Boeing 737.

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• A Southwest Airlines flight diverted to South Carolina an hour into its journey.
• "A customer's battery charger apparently overheated and began to smoke," the airline told BI.
• The incident came the day after Southwest introduced new rules for portable charging devices.

A Southwest Airlines flight had to divert after a passenger's battery charger started to smoke, the day after the airline introduced new rules for devices.