Power Bank Rules for Flights: The Count, Capacity and Packing Rules (2026)
Table of contents
Carry power banks in your cabin baggage, never in checked luggage. Under ICAO's revised specification, effective 27 March 2026, passengers are limited to two power banks and must not recharge them during the flight. A power bank up to 100 watt-hours (Wh) is generally accepted; one above 100Wh and up to 160Wh normally needs airline approval; larger units are usually not accepted on passenger aircraft. Your airline or departure country may impose stricter rules than this baseline.
Key takeaways
- Power banks are spare batteries and belong in the cabin, not checked baggage.
- ICAO's 2026 specification limits power banks to two per passenger and prohibits recharging them in flight.
- Capacity and count answer different questions: a power bank can be under 100Wh but still exceed a two-device rule.
- The operating airline and the departure authority can impose stricter rules than the ICAO baseline.
The six checks that decide whether your power bank can fly
A power bank passing one test doesn't mean it's cleared. Every packing decision reduces to six checks, and they are cumulative: passing the capacity test does not override the count limit, and passing both does not override a stricter airline policy.
| Check | Practical rule |
|---|---|
| Where packed? | Cabin baggage only; remove it if the bag is gate-checked |
| How many? | ICAO's 2026 specification: maximum two per passenger |
| Capacity | Up to 100Wh generally allowed |
| Larger units | Above 100Wh to 160Wh may require airline approval |
| Inflight charging | Do not recharge the power bank during flight |
| Physical condition | Terminals protected; no swollen, recalled or damaged battery |
Read each row as a gate, not a checklist you can pick and choose from. A traveler carrying a single 90Wh power bank in perfect condition can still be stopped at the gate if it's packed in a bag headed for the hold, because the "where packed" gate failed even though capacity and count both passed.
What changed in 2026?
On 27 March 2026, the International Civil Aviation Organization announced that its revised specifications were effective immediately. They introduced two headline controls: no more than two power banks per passenger, and no recharging of power banks during flights.
National authorities and airlines then implement operational rules on top of that global baseline. Singapore provides a useful dated example: the Civil Aviation Authority of Singapore began enforcement for flights departing Singapore at 00:01 Singapore time on 15 April 2026. It applies the two-device limit, prohibits charging a power bank onboard, and advises against using one to charge another device during the flight.
The two dates are not interchangeable, and conflating them is one of the most common mistakes travelers make when researching this topic. ICAO's specification took effect globally on 27 March; Singapore's local implementation began nearly three weeks later, on 15 April. A traveler flying out of Singapore before 15 April was still bound by ICAO's global specification, just not yet by the specific Singapore enforcement mechanics. After that date, both apply together for flights departing Singapore.
Carry-on only means accessible in the cabin
A power bank is treated as a spare lithium battery. IATA and the US FAA both say it should not go in checked baggage.
This matters most at the gate, not at the check-in counter. If your cabin suitcase is too large for the overhead bin, or the flight is full and staff ask to load your bag into the hold, remove every power bank and spare lithium battery from it first. Keep them with you in the cabin rather than letting them travel down to the hold inside a bag you assumed was staying with you.
Do not leave terminals exposed beside coins, keys or other metal objects in a pocket or a loose bag compartment. Keep each unit in its retail packaging, in a separate protective pouch or plastic bag, or cover exposed terminals with non-conductive tape.
How to read the capacity label
Air rules use watt-hours, not milliamp-hours alone. The safest source is the Wh value printed on the device itself.
If only voltage and capacity are shown, the conversion is straightforward:
Wh = volts × amp-hours
Because 1,000mAh equals 1Ah, that becomes:
Wh = volts × mAh ÷ 1,000
Here's what that looks like using a nominal 3.7V cell voltage, the figure common to most consumer power banks:
| Label | Calculation | Approximate energy |
|---|---|---|
| 10,000mAh | 3.7 × 10,000 ÷ 1,000 | 37Wh |
| 20,000mAh | 3.7 × 20,000 ÷ 1,000 | 74Wh |
| 27,000mAh | 3.7 × 27,000 ÷ 1,000 | 99.9Wh |
| 30,000mAh | 3.7 × 30,000 ÷ 1,000 | 111Wh |
Notice how close the 27,000mAh example sits to the 100Wh line. A slightly higher nominal cell voltage than the illustrative 3.7V used here, or a manufacturer's own more conservative rating, could push a device advertised at 27,000mAh either side of the threshold. That's exactly why the printed Wh figure on the unit itself, not a mAh number from a marketing listing, is what airline and security staff will look for.
Use the manufacturer's printed rating rather than calculating from USB output voltage: the USB port typically outputs 5V regardless of the battery's actual nominal cell voltage, so using 5V in the formula will produce a wrong and usually inflated estimate. A 30,000mAh unit calculated this way may fall into the approval band rather than the generally-allowed band, so check the label before you pack, not at the gate. An unreadable or missing Wh label can also lead to refusal, because staff have no way to confirm capacity.
The capacity bands
Up to 100Wh
IATA guidance says power banks up to 100Wh are generally allowed in carry-on baggage. "Generally" matters here: airline quantity limits, labelling requirements, physical condition and route-specific restrictions still apply on top of the capacity pass.
Above 100Wh and up to 160Wh
These may be accepted with advance airline approval. Do not arrive at the gate expecting approval to be automatic or assumed. Contact the operating carrier before travel, describe the device and its printed Wh rating, and retain the carrier's response in case you're asked for it at check-in or the gate.
Above 160Wh
IATA describes these as usually not permitted on passenger aircraft. Specialist equipment above this threshold may require separate cargo arrangements instead. Don't try to interpret a stated rating creatively to argue a unit belongs in a lower band; staff assess the individual battery and its printed label, not a traveler's math.
Charging and use are separate questions
"Can I carry it?" and "can I use it?" are different questions with different answers.
The ICAO change prohibits recharging the power bank itself from seat power during flight. Singapore also advises passengers not to use a power bank to charge another device onboard. An airline may go further and prohibit use completely, require the unit to remain visible for the whole flight, or direct exactly where it must be stowed during taxi, takeoff and landing.
The robust traveler rule is simple: board with your devices already charged, keep the power bank accessible and switched off rather than mid-charge, and follow the crew's instruction on the day, even if a different airline allowed onboard use on an earlier sector of the same trip.
Which rule controls on a connecting itinerary?
Multi-leg itineraries raise a practical problem: which authority's rule actually governs a power bank that's traveling through several jurisdictions and possibly several operating carriers in one day? The safest approach is to apply the strictest rule that touches any part of the journey, in this order:
- The aviation rules at the departure point.
- The operating airline's conditions for that specific flight.
- Any transfer-security or local rule at a connecting airport.
- The next operating carrier's rules for the onward sector.
A ticket sold under one airline's code may actually be operated by a different carrier on part or all of the journey. Check the "operated by" line for every sector of your itinerary, since the rules that apply to a codeshare flight follow the operating airline, not necessarily the one whose name is on your ticket or boarding pass.
A five-minute preflight checklist
- Find the Wh rating printed on every power bank you plan to bring.
- Carry no more than two.
- Request airline approval in advance for any unit rated above 100Wh.
- Put each unit in hand baggage, never in checked luggage.
- Protect terminals and prevent accidental activation in your bag.
- Remove power banks from any bag before it's gate-checked into the hold.
- Leave swollen, damaged or recalled units at home.
- Do not recharge the power bank onboard.
- Check the operating airline's current dangerous-goods page before you travel.
If a power bank overheats onboard
Do not hide it, move it casually to another bag, or try improvised cooling yourself. Tell cabin crew immediately if a power bank becomes unusually hot, expands, smokes or burns. IATA notes that crew are trained to respond to exactly this situation, and that keeping the device accessible in the cabin, rather than buried in an overhead bin or, worse, in checked luggage in the hold, is central to controlling the risk in the first place.
Myths, debunked
"Under 100Wh means unlimited."
No. Capacity and quantity are separate controls that both have to be satisfied. A traveler could carry five power banks each rated well under 100Wh and still be over ICAO's two-device limit.
"My bag is carry-on, so it can stay inside even if it's gate-checked."
No. The rule is about where the bag physically ends up, not what size category it started as. Remove power banks before the bag enters the aircraft hold.
"The USB output says 5V, so that's the battery's voltage."
Not necessarily. USB output voltage and the battery's actual nominal cell voltage are different figures. Use the printed Wh rating on the device, or the manufacturer's specified nominal cell voltage, rather than the USB port spec.
"One airline allowed it, so all of them will."
No. Airlines and local authorities may set rules stricter than the ICAO baseline, and a policy that applied on one sector of a trip isn't guaranteed to apply on the next.
Frequently asked questions
Can I put a power bank in checked luggage?
No. Power banks are treated as spare lithium batteries and must remain in carry-on baggage. Remove them if your cabin bag is gate-checked.
How many power banks can I take in 2026?
The ICAO 2026 specification limits power banks to two per passenger, but implementation and airline rules must still be checked for the specific flight.
Is a 20,000mAh power bank allowed?
Usually, if its energy rating is no more than 100Wh. At a nominal 3.7V, 20,000mAh is about 74Wh, but use the manufacturer's printed Wh rating.
Can I use a power bank during the flight?
Do not assume so. The 2026 specification prohibits recharging power banks in flight, and Singapore advises passengers not to use them to charge devices. Airlines may be stricter.
Methodology
This guide was researched on 12 August 2026 using current ICAO, CAAS, IATA and FAA primary and authoritative-industry pages. We normalized each source across six fields (packing location, count, capacity, approval, inflight charging or use, and short-circuit protection) and labelled jurisdiction-specific rules rather than universalizing them. The article deliberately separates the global ICAO standard from Singapore's national implementation date and from carrier-level discretion, since collapsing those three layers into one figure is the most common error travelers make on this topic. It is not a substitute for the operating airline's dangerous-goods decision at the actual point of departure.
Sources
Packing sorted. Now check whether your next hotel has a lower wholesale rate.
Check a hotel →Published August 13, 2026. Based on a review of current ICAO, CAAS, IATA and FAA primary guidance on 12 August 2026. Rules change and airline or national policy can be stricter than this baseline; confirm the operating carrier's current dangerous-goods page before you travel.