Power banks have become a carry-on staple, and for good reason, but they’re also lithium-ion batteries, which means they come with genuine safety rules, not just airline preferences. Most travelers never think twice about tossing one in a bag, but a few common habits around power banks can get them confiscated, or worse, actually create a real fire risk in flight.
Here are seven things to avoid the next time you’re flying with a portable charger.
Don’t Pack It in a Checked Bag
Power banks are required to travel in carry-on luggage, not checked bags, because a battery fire in the cargo hold is far harder to detect and control than one in the cabin. This is a hard rule, not a suggestion, laid out clearly in TSA’s power bank guidance.
Don’t Assume Every Airline Allows the Same Capacity
Most airlines follow a general limit around 100 watt-hours without special approval, with some allowing larger batteries up to 160 watt-hours with airline permission. Capacities above that are generally not allowed at all. Check your specific airline’s policy rather than assuming your power bank is automatically fine.
Don’t Bring a Damaged or Swollen Battery
A power bank that’s cracked, swollen, or has been dropped hard is a genuine fire risk and should be replaced, not packed. Airlines and TSA agents can and will refuse a visibly damaged battery.
Don’t Leave It Charging Unattended
Charging a power bank or device in a seatback pocket and forgetting about it, especially during sleep, has led to real onboard incidents. Keep charging devices where you can see them and remove them from seat pockets when not in use.
Don’t Pack It Loose Without Terminal Protection
A power bank rattling around loose in a bag can short-circuit if its terminals contact metal objects like keys or coins. Keep it in a padded pouch or its original case.
Don’t Forget It Counts Toward Carry-On Battery Limits
If you’re traveling with multiple spare batteries or power banks, be aware that total watt-hour limits can apply across all of them combined, not just per item, depending on the airline.
Don’t Assume International Rules Match U.S. Rules
Some countries and airlines outside the U.S. have stricter power bank restrictions, including outright bans on certain capacities in the cabin. Check the rules for every airline and country on your itinerary, not just your departure point, referencing the FAA’s lithium battery resource as a baseline.
