Thailand Tightens Power Bank Rules for Air Travellers Amid Flight Safety Concerns

Thailand has introduced stricter regulations governing power banks on commercial flights, with aviation authorities imposing tighter controls on how passengers carry, store, and use lithium battery devices during air travel.

The new rules were announced by Thailand’s Civil Aviation Authority (CAAT) as part of updated aviation safety measures aligned with international dangerous goods regulations issued by the International Civil Aviation Organization (ICAO). (nationthailand)

Under the updated regulations, passengers may carry power banks only in cabin baggage and are strictly prohibited from placing them in checked luggage. Authorities also banned the use or charging of power banks during flights due to growing concerns over lithium battery overheating and onboard fire risks. (nationthailand)

New Power Bank Restrictions Explained

According to CAAT’s revised rules, standard power banks must not exceed 100 watt-hours (Wh), roughly equivalent to 20,000mAh, to be carried without special approval. Devices rated between 100Wh and 160Wh require prior airline authorization and are limited to two units per passenger. Power banks exceeding 160Wh are completely prohibited on passenger aircraft. (nationthailand)

The authority also stated that:

Power banks must remain easily accessible during flights
Devices cannot be stored in overhead compartments
Passengers may not use power banks to charge phones or laptops onboard
Charging power banks using aircraft USB ports or sockets is forbidden
Unlabeled or unverifiable batteries are banned from flights

(nationthailand)

Officials advised travellers to keep power banks either on their person, in seat pockets, or under the seat in front of them to allow rapid access in case of overheating or smoke incidents. (Scandasia)

Safety Concerns Prompt Crackdown

The stricter measures follow several battery-related incidents reported globally and across Asia in recent years, including cabin smoke events and suspected fires linked to lithium-ion power banks. (Thaiger)

CAAT said lithium batteries pose a significant aviation hazard because damaged or improperly stored batteries can enter “thermal runaway,” a dangerous overheating chain reaction capable of producing smoke, intense heat, or fire during flight. (nationthailand)

Thai Airways had already introduced a separate onboard ban in 2025 preventing passengers from using or charging power banks during flights, while other Asian airlines have adopted similar policies. (The Investor)

Airlines across South Korea, Japan, Singapore, and parts of Europe have also tightened lithium battery rules following aviation safety investigations involving portable battery devices. (Better Mobile Xperience)

Airlines Begin Enforcing New Standards

Major airlines operating in Thailand have begun updating passenger guidance and cabin safety procedures to reflect the new rules.

Thai Airways currently permits up to 20 spare lithium batteries under 100Wh but continues prohibiting their use onboard. (Thai Airways)

AirAsia separately limits passengers to two power banks below 100Wh per traveller. (AirAsia Support)

Bangkok Airways and several international carriers serving Thailand have also updated safety advisories warning passengers not to store power banks in overhead bins. (Facebook)

Aviation experts say enforcement is likely to increase at major airports including Suvarnabhumi, Don Mueang, Phuket, and Chiang Mai, where security staff may inspect battery labels and confiscate devices lacking visible specifications. (Reddit)

Travellers Urged to Check Device Labels Before Flying

Authorities are urging passengers to verify battery specifications before arriving at airports to avoid delays or confiscation.

Experts recommend:

Using clearly labeled certified power banks
Keeping batteries in protective cases
Avoiding damaged or swollen devices
Carrying only approved capacities
Checking airline-specific restrictions before departure

The CAAT said the updated rules are intended to improve passenger safety while maintaining consistency with evolving international aviation standards for lithium battery transport. (nationthailand)