Power banks have become essential travel gadgets, helping passengers keep their phones, tablets, and laptops charged throughout long journeys. However, despite their convenience, airlines impose strict rules on how and where power banks can be carried. These regulations are mainly tied to passenger safety and the potential risks associated with lithium-ion batteries. Below are the main reasons why airlines handle this issue with extra caution.
1. Risk of Fire
Power banks rely on lithium-ion batteries, which are known for being lightweight and efficient but also sensitive to heat and damage. Under certain conditions (such as being crushed, exposed to high temperatures, or manufactured poorly) these batteries can overheat and potentially catch fire. While rare, incidents of lithium battery fires on planes have been reported, and airlines aim to prevent such emergencies at all costs. By requiring passengers to keep power banks in the cabin, crew members can quickly respond if overheating or smoke occurs, significantly reducing danger.
2. Battery Safety at High Altitudes
Lithium-ion batteries don’t just carry fire risks; they are also sensitive to pressure and continuous charging cycles. During a flight, changes in air pressure and cabin temperature can stress batteries that are already under load from charging devices. For example, a power bank that is used non-stop to charge multiple devices might get warmer than intended. In rare cases, this could cause swelling or malfunction. This is why airlines ask passengers to handle power banks carefully, avoid charging them constantly during the flight, and don’t expose them to extreme conditions.
3. Interference Concerns (Rare but Considered)
Another factor, though less common, is electromagnetic interference. In the past, aviation authorities noted that uncertified or cheaply made power banks could emit electromagnetic signals that might interfere with sensitive aircraft instruments. Today’s modern aircraft are much better shielded, making this risk very small. However, airlines continue to enforce cautious guidelines, ensuring that only safe and certified devices are used onboard. This rule helps eliminate the chance of unexpected interference, even if the likelihood is slim.
4. Practical Safety Rules for Passengers
Airlines do allow passengers to bring and use power banks, but they apply several practical restrictions to minimize risk. These include:
- No use during takeoff and landing: Just like laptops and other electronic devices, power banks must be stowed during critical phases of flight.
- Keep power banks visible: They should not be buried in pockets, under blankets, or deep inside carry-on bags. If a battery overheats, cabin crew must be able to spot and address the issue quickly.
- Carry-on only: Power banks are never permitted in checked baggage, as crew members cannot access the cargo hold in case of a fire.
FAQs
Can I bring a power bank on a plane?
Yes, but only in your carry-on bag, not in checked baggage.
Is there a size limit for power banks?
Yes, up to 100Wh (around 10,000mAh) is allowed freely. Between 100–160Wh (approx. 27,000–43,000mAh) may need airline approval. Above 160Wh is not allowed.
Why are power banks not allowed in checked baggage?
Because lithium-ion batteries can overheat or catch fire, and it’s safer to keep them in the cabin where crew can react quickly.
Can I carry multiple power banks?
Yes, but most airlines limit it to 2 power banks within the allowed capacity. Always check your airline’s exact rule.
