Power Banks on Planes: Rules, Limits and Packing Tips
Quick answer
Power banks (lithium-ion batteries) belong in your carry-on bag, never in checked luggage, because a damaged battery can overheat and the cabin crew can reach it quickly. Most airlines allow banks up to 100 Wh without approval and up to 160 Wh with airline permission, but some carriers now add rules on how many you can carry or whether you may use them in flight, so check your airline before you fly.
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Why power banks are restricted
A power bank is a lithium-ion battery in a casing. When a cell is crushed, punctured, overcharged or defective it can enter thermal runaway, which means it heats rapidly and can ignite. In the cabin, a crew member can spot smoke, reach the device and use fire-containment equipment. In the hold, nobody can intervene. That single difference explains the rule that matters most: spare batteries travel in the cabin only.
The same logic applies to e-cigarettes and loose spare camera or laptop batteries. Devices with batteries built in, such as phones and laptops, are generally allowed in checked bags when switched fully off, but most travellers keep them with them anyway.
How to read your power bank's capacity
Airline limits are written in watt-hours (Wh), but power banks are usually labelled in milliamp-hours (mAh). If the Wh figure is not printed on the casing, you can work it out: multiply the mAh rating by the battery's nominal voltage (normally 3.6 or 3.7 V for the cells inside) and divide by 1,000.
| Printed capacity | Approximate Wh (at 3.7 V) | Typical treatment |
|---|---|---|
| 10,000 mAh | about 37 Wh | Usually allowed in cabin |
| 20,000 mAh | about 74 Wh | Usually allowed in cabin |
| 26,800 mAh | about 99 Wh | Close to the 100 Wh line, check the label |
| Above 27,000 mAh | over 100 Wh | Needs airline approval, if allowed at all |
Treat the table as a guide only. Cell voltage varies, so use the Wh figure printed on the product when there is one. If your bank has no legible rating at all, many security teams will refuse it, so it is not worth the gamble.
The general rules most airlines follow
- Cabin only: spare lithium batteries and power banks go in hand luggage, not in the hold.
- Up to 100 Wh: generally accepted without special approval.
- 100 to 160 Wh: usually needs the airline's approval, and many carriers cap the number at two.
- Over 160 Wh: normally not permitted as a passenger item.
- Protect the terminals: keep the bank in its original case or a pouch, or tape over exposed USB contacts, so it cannot short against keys or coins.
Some airlines have recently added extra conditions, for example asking passengers to keep banks visible rather than buried in an overhead locker, or not to charge them during the flight. Because policies differ and change, read your airline's page for dangerous goods or batteries before you pack.
Using a power bank on board
Even where use is allowed, a few habits reduce risk. Do not charge a bank under a pillow or blanket where heat cannot escape. Do not leave it plugged in and unattended in a seat pocket, where it can be crushed when the seat reclines. If a device or bank becomes hot, swells, smells odd or emits smoke, tell the cabin crew immediately and do not try to handle it yourself.
If a crew member asks you to switch a bank off or stop charging, comply straight away. Their instructions follow the airline's safety procedures.
At security and the gate
Power banks usually go through the X-ray in your bag, though some airports ask for them to be taken out and placed in a tray with other electronics. A bank that is damaged, swollen, or unmarked may be removed. If you are carrying a larger bank because you take camera gear or a CPAP machine, bring documentation showing its watt-hour rating and ask the airline in advance.
If you are told at the gate that your bank cannot travel, you generally have two options: surrender it or leave the airport with it. Airlines cannot put it in the hold for you, because that is exactly what the rule prohibits.
Packing tips that avoid trouble
- Buy from a reputable brand and check that the Wh figure is printed on the unit.
- Stop using any bank that has been dropped hard, got wet, or looks puffy.
- Carry only the capacity you need. One 10,000 mAh bank usually recharges a phone two to three times.
- Bring short cables so charging is tidy and the bank sits in your lap or bag, not dangling.
- Check connecting flights too. If your trip uses different airlines, the strictest policy is the one that counts.
Plan the rest of your trip
Once your bag is sorted, compare fares across the market on ScanFlyGo, look at popular routes for ideas, and use the live flight tracker to see whether your inbound aircraft is on time before you leave for the airport.
Frequently asked questions
Can I put a power bank in my checked bag?
No. Spare lithium batteries, including power banks, must travel in your cabin baggage. Putting one in the hold is prohibited by most airlines and aviation regulators because a fire there cannot be reached quickly.
How many power banks can I take on a plane?
Rules vary by airline. Many allow several banks of 100 Wh or less, and cap the larger 100 to 160 Wh ones at two with approval. Check your carrier's current policy before you fly.
Is a 20,000 mAh power bank allowed on a plane?
Usually yes. At a typical 3.7 V cell voltage, 20,000 mAh is about 74 Wh, which is under the common 100 Wh limit. Confirm the Wh label on your unit and your airline's rules.
Can I charge my phone from a power bank during the flight?
It depends on the airline. Some permit it, others restrict or ban in-flight use of power banks. Where it is allowed, keep the bank visible, not under bedding, and stop if it gets hot.
What happens if my power bank is confiscated?
Security or gate staff will normally ask you to surrender it, since it cannot be placed in the hold. Keeping the Wh label legible and the unit undamaged is the best way to avoid it.
The bottom line
Keep every power bank in your cabin bag, check the Wh figure and the airline policy, protect the terminals, and do not charge unattended. Rules keep tightening in places, so a two-minute check before departure beats a confiscated battery at the gate. When you are ready to plan the trip, start a live search on ScanFlyGo, browse the popular routes, or track your flight live on the day.
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