Why batteries get special treatment
The lithium-ion batteries inside phones, laptops, cameras and power banks store a lot of energy in a small space. If one is damaged or faulty it can overheat. On an aircraft, the cabin crew can spot and deal with that quickly; inside a suitcase in the hold, nobody would notice. That is the main reason airlines and aviation authorities treat spare batteries differently from ordinary luggage.
Power banks belong in the cabin
As a general rule, power banks and spare batteries must go in your hand luggage, not in a checked bag. There are usually limits on capacity, expressed in watt-hours, and very large units may need approval or may not be allowed at all. Most everyday phone power banks fall well below these limits, but it is worth checking the rating printed on yours if it is a big one.
Rules on using power banks during the flight have also become stricter on many airlines in recent years. Some ask that you do not charge devices from a power bank in flight, or that power banks stay out of the overhead locker where they can be seen. Follow the crew's instructions and check your airline's current guidance before you travel.
Protecting batteries in your bag
Keep spare batteries in their original packaging, a dedicated case or a small pouch so the terminals cannot touch metal objects such as keys or coins. Tape over exposed contacts on loose camera batteries. Avoid carrying power banks that are swollen, cracked or have been dropped hard, and buy from reputable brands that show clear capacity markings.
If a device becomes hot, starts to smell or smoke, or you drop your phone into a seat mechanism, tell the cabin crew straight away rather than trying to retrieve it yourself. Moving a seat can crush a trapped device.
Laptops, tablets and cameras
Devices with built-in batteries are normally fine in the cabin. Keep them easy to reach, as some security checkpoints still ask you to remove larger electronics from your bag. Switch them to flight mode when asked and make sure they are fully powered down, not just asleep, if they must go in a checked bag for any reason.
Charge everything the night before. A full battery reduces the need to hunt for sockets at the gate, and a phone with power means your digital boarding pass is always ready to scan.
Good to know
- Check the watt-hour rating printed on large power banks before you pack them.
- Never put spare batteries or power banks in checked luggage.
- Carry a short cable in your pocket so you can charge at airport outlets without unpacking.