Normal spare lithium power bank
- FAA packing position
- Cabin baggage only; protect from damage and short circuit
- What still needs checking
- Exact capacity and the operating airline's limits
Travel adapters and charging
Can I bring a portable charger on a plane?
The short answer
Power banks are spare batteries: keep them in the cabin, read the Wh label and check every operating airline for capacity, quantity, storage and use.
Last updated October 15, 2026
What's covered10
- Can I bring a portable charger on a plane: US baseline
- Carry-on, checked bags and gate checking
- Read watt-hours from the correct label
- Capacity and approval are different stages
- A route-specific airline check
- Storage onboard and rules for use and charging
- Protection and battery condition
- Screening and international connections
- A practical pre-flight record
- Portable charger flight FAQs
Start with the battery label and the operating airline's rules before packing a power bank. A power bank is a spare battery for packing purposes. It belongs in the cabin under the US baseline. Check its rating and the carrier's limits before travel.
Start with US battery rules, then check every operating airline and any foreign rules for the itinerary. Capacity, onboard use and charging can have separate restrictions.
Can I bring a portable charger on a plane: US baseline
| Decision | Normal spare lithium power bank | Larger spare in the FAA approval category | Consumer bank beyond the ordinary permitted range | Damaged or recalled battery likely to create dangerous heat | Installed tablet battery |
|---|---|---|---|---|---|
| FAA packing position | Cabin baggage only; protect from damage and short circuit | Airline approval required; the FAA category is limited to two larger spares | Do not treat as standard passenger baggage | Do not carry under the stated restriction | Different item category from a spare bank |
| What still needs checking | Exact capacity and the operating airline's limits | Whether that airline accepts the actual power bank at all | Read the official rules for the actual item | Maker recall and airline guidance | Device and airline rules, not the spare-bank assumption |
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Larger spare in the FAA approval category
- FAA packing position
- Airline approval required; the FAA category is limited to two larger spares
- What still needs checking
- Whether that airline accepts the actual power bank at all
Consumer bank beyond the ordinary permitted range
- FAA packing position
- Do not treat as standard passenger baggage
- What still needs checking
- Read the official rules for the actual item
Damaged or recalled battery likely to create dangerous heat
- FAA packing position
- Do not carry under the stated restriction
- What still needs checking
- Maker recall and airline guidance
Installed tablet battery
- FAA packing position
- Different item category from a spare bank
- What still needs checking
- Device and airline rules, not the spare-bank assumption
Under the FAA battery rules, the normal lithium-ion limit is 100 Wh; the larger spare category through 160 Wh needs airline approval. Carrier rules can be stricter. Mobility aids follow separate rules.
Carry-on, checked bags and gate checking
Keep the power bank in cabin baggage. A cable plugged into a phone does not make the bank an installed phone battery. Its function remains that of a spare external power source. Read the exact rules for the item you are packing.
If the cabin bag is taken at the gate, remove the power bank before it leaves you. Keep it with you in the cabin according to the airline's storage rule. A bag that began as carry-on is not still cabin baggage once it is checked.
Make the bank easy to reach before arriving at the gate. Do not bury it under everything in a tightly packed bag. This also makes the label available if staff need to inspect it. Keep cables and protective packaging arranged so the battery is not loose against metal objects.
Do not use a checked bag as a solution when a bank exceeds the airline's cabin rule. The spare-battery limit does not disappear in the hold. Resolve the capacity and permission question before travel or leave the item out.
Read watt-hours from the correct label
Look for Wh on the power bank's own rating label or the maker's exact model guides. A larger printed marketing number may be milliamp-hours, not watt-hours. Read the units rather than choosing the largest or most familiar number.
The FAA explains the calculation as volts multiplied by amp-hours. For milliamp-hours, divide by one thousand to obtain amp-hours first. Use the battery's rated voltage. Take capacity from the same set of model details. The USB output voltage may differ from the battery voltage you need.
The FAA's own example uses a twelve-volt battery with eight amp-hours: the result is ninety-six watt-hours. It illustrates the formula, not the rating of your bank. Read the actual model's label before using the result to ask an airline about carriage.
If capacity or voltage is unclear, keep the rating unknown. Do not guess a zero or select a convenient value from a different model. Ask the maker for the exact specification and the airline about acceptance. A handwritten estimate is not promised to satisfy staff.
Capacity and approval are different stages
A capacity below a general threshold does not remove every condition. The battery must still be allowed for personal use. Protect it properly. Stay within the airline's quantity and storage limits. Its physical condition also matters.
For a larger spare in the FAA approval category, get the operating carrier's decision before travel. This range is not a promise that the airline accepts every bank within it. Keep the response tied to the actual model and flight.
Do not treat an unreadable label as a favorable result. If staff cannot determine the capacity, the outcome remains uncertain. Resolve that before the flight. A general example or seller's advice does not settle it.
The FAA lithium-battery page also notes stricter airline limits. Check the current wording for the trip, including any connection. A rule for one flight is not automatically permission for the next carrier.
A route-specific airline check
| Source or operator | Checked rule or useful distinction | Action for the passenger |
|---|---|---|
| FAA US passenger guidance | Spare power banks stay in the cabin; capacity and protection conditions apply | Use as a baseline, then read the carrier's actual rules |
| United electronics policy | Up to two portable chargers; keep them on you or in a personal item, not overhead; do not recharge them from aircraft power | Recheck the current operating-flight policy before packing |
| UK Civil Aviation Authority | Keep power banks with you in the cabin and check the airline | Apply the actual UK route and airline instructions |
| Any connecting operating airline | Not inferred from the first flight's policy | Check quantity, Wh, storage and use for that leg |
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Check United's electronics rules and the UK CAA packing guide for the relevant itinerary. The United statement is an airline example, not a global two-bank rule.
Use the airline that operates the flight, including a codeshare leg. A booking brand and operating carrier can differ. Put each leg's operator on the check list so a connection does not inherit an unrelated policy.
Storage onboard and rules for use and charging
Carriage and use are distinct permissions. A bank allowed into the cabin may have limits on where it sits or whether it can be used. Read the current airline rule and follow crew steps. Do not assume permission to carry automatically permits recharging from a seat outlet.
United's checked example separates portable-charger storage from normal device use. Keep that distinction when reading other carriers too. A small phone in flight mode and an external battery can be handled under different policies.
If the airline prohibits a given charging activity, a different cable does not change that rule. Prepare the phone before boarding and keep needed files offline. A travel plan should not depend on access to an exact seat outlet or onboard Wi-Fi.
Do not put a charger where it can be crushed or lost in a seat mechanism. If a device falls into a seat, tell the crew and follow their steps. Avoid moving the mechanism in an attempt to retrieve it yourself.
Protection and battery condition
Protect spare terminals from contact with metal and protect the bank from damage. The FAA gives several examples. These include original packaging and covered terminals.
A suitable separate case or pouch is another option. Choose protection that fits the battery. Do not carry it loose with coins or keys.
Inspect the condition before packing. Do not treat an item that is swollen or leaking, or one that has been recalled as a normal good battery. Check the maker's current recall details and the official carriage limit. This article does not give a method to make a dangerous battery acceptable for travel.
Tell the crew promptly if a battery becomes hot or expands. Also report smoke or fire at once. The FAA says to tell the crew. Do not hide it in a bag or continue charging while hoping the problem passes.
Keep the label readable in the protective arrangement. Protect the bank while keeping its rating readable. Save the maker's exact model details too. They help with a check but do not guarantee acceptance.
Screening and international connections
Security screening and airline carriage are different checks. An item passing one checkpoint does not show that every carrier or country permits it. Follow the current airport steps and read the operating airline's dangerous-goods policy for each leg.
For a route outside the US, check its aviation authority. Read the airline policy too. US rules do not settle every foreign rule. The UK CAA example reinforces cabin carriage but still directs passengers to the airline. Do not turn similar wording into a claim that all countries have identical rules.
If a connection changes carriers, repeat the model and quantity check for that operator. Keep any required approval with the trip records. Rules may change before the return flight. Check again for that journey.
A practical pre-flight record
Write down the exact power-bank model and the Wh shown on its label. Add the number carried and the operating carrier for each flight. Mark capacity and quantity as separate checks. Add storage and onboard use too. An unanswered field stays open.
Keep an approval response if the exact item requires one. Keep it with the maker's model details and check date. Do not use a different model's rating or a seller's image as proof of your own battery's capacity.
Before the cabin bag leaves you at the gate, check the bank is still with you. Recheck that it is protected and placed where the carrier permits. Save travel documents offline so a lack of allowed onboard charging does not block access to them.
Portable charger flight FAQs
Can I put a power bank in checked luggage?
Under the FAA's stated spare-battery rules, power banks belong in carry-on baggage and must not be checked. Remove them if a cabin bag is gate-checked. Keep the actual operating airline's storage and quantity rules in view too. Moving an oversized bank into checked luggage is not a solution.
Is every bank below a general Wh limit accepted?
No blanket acceptance is promised. Airline quantity, condition and storage rules still apply, and some policies are stricter. The exact rating must also be clear. Check the actual model and operating flight before travel rather than treating a general capacity category as permission for every battery.
Can I calculate capacity from milliamp-hours alone?
No. The calculation also needs the correct battery voltage. The FAA explains volts multiplied by amp-hours, with milliamp-hours first divided by one thousand. Use matching nominal battery specifications, not a convenient USB output value. If either input is unclear, keep watt-hours unknown and ask the maker.
May I use or recharge the bank onboard?
Read the operating airline's current policy. Permission to carry a bank is not automatically permission for every charging activity. United's checked example restricts storage and recharging from aircraft power. Other carriers need their own rule read, and crew steps apply to the actual flight.