What proper checks should a passenger carry out on the lithium batteries when packing them for travel?

Passengers play an important role in ensuring aviation safety. Therefore, it is advisable that a passenger make the following safety check when packing lithium batteries before traveling.

 

Checklist	Attention	Illustration
Check for any physical damage to the power bank	If the power bank is swollen, deformed (such as a bulging battery), cracked, or shows signs of being pierced or crushed, stop using it immediately. Such physical damage seriously affects the structural integrity and insulation, which can easily cause a short circuit, leading to overheating or fire.
Check for overheating of the power bank	If the power bank becomes abnormally hot during charging or use, produces crackling sounds, or the charger connector shows signs of aging or melting, these are warning signs of safety issues that greatly increase fire risk.
Ensure a safe environment when placing the power bank	During storage or transportation, avoid impacts, punctures, or crushing, which can deform the battery or damage its internal layers, increasing the risk of overheating. It is recommended to use a protective case or place the power bank in a separate pocket.
Ensure the power bank complies with onboard carriage requirements	When carrying a power bank on a plane, make sure its lithium battery complies with relevant aviation regulations, such as lithium content for lithium metal batteries or capacity for lithium-ion batteries.   For details, please refer to the “Security Control Articles” under the “Public and Passenger Guide" on the AACM Official Website via https://www.aacm.gov.mo/.   In addition, to comply with the latest requirements announced by the International Civil Aviation Organization regarding the carriage and use of lithium battery power banks by air passengers, commencing 29 March 2026, each departing passenger can carry no more than two power banks in their carry-on baggage, and charging power banks during flights is strictly prohibited.
Airlines may impose additional restrictions on the carriage and usage of lithium batteries on aircraft based on safety considerations and operational measures. Therefore, passengers are advised to check with their airline for the latest requirements before traveling.