Spare lithium batteries, which include both power banks and phone chargers, are prohibited in checked luggage. The final decision rests with the TSA officer on whether an item is allowed through the checkpoint. Powder banks that is larger than that will need prior approval. . The TSA now requires portable chargers and power banks to be placed only in carry-on luggage. This change is due to the risk of fire from overheating devices. Understanding these regulations. .
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