Can I bring a power bank on a plane?

Yes, in carry-on luggage only, never in checked baggage. The capacity must be under 100 Wh for unrestricted carry-on; 100-160 Wh requires airline approval; over 160 Wh is prohibited on passenger flights entirely. This rule applies on essentially every commercial airline worldwide.

How do I calculate the watt-hour rating of my power bank?

Watt-hours (Wh) = milliamp-hours (mAh) × voltage (V) ÷ 1000. For most consumer power banks the internal cell voltage is 3.7 V. A 20,000 mAh power bank = 20,000 × 3.7 ÷ 1000 = 74 Wh. Most power banks print the Wh value directly on the label.

What's the maximum power bank size I can bring on a plane?

100 Wh without airline approval. This typically corresponds to about 27,000 mAh at 3.7 V cell voltage. Between 100 Wh and 160 Wh requires airline pre-approval (usually free but takes time). Above 160 Wh is prohibited on passenger flights, period.

Can I bring multiple power banks?

Most airlines allow up to two power banks per passenger between 100-160 Wh (with approval). Below 100 Wh, the rules are less strict but airlines typically limit you to two to four banks per person to prevent stockpiling. Practical limit: most travelers don't need more than two.

What happens if security finds a non-compliant power bank?

Power banks over 100 Wh without approval are typically confiscated at security. Power banks in checked baggage are removed if discovered (and sometimes the entire bag is delayed for hand inspection). Power banks that have shorted, smoked, or are visibly damaged are confiscated regardless of capacity. Worst case: the airline may delay your flight while they handle the battery safely.

Power Banks on Planes: 2026 TSA, IATA, and Airline Rules

Lithium-ion power banks have specific rules on airplanes because of the genuine fire risk if a battery shorts or fails. The rules are mostly consistent across airlines and countries because they originate from the same IATA Dangerous Goods Regulations, but airline-specific details vary. This guide covers what's actually allowed, the math to check your power bank, and what to do if your bank is over the limit.

The basic rules

The international consensus (set by IATA and adopted by most national aviation authorities):

Power banks must be in carry-on luggage, never checked
Under 100 Wh: allowed without restriction
100-160 Wh: allowed with airline pre-approval, typically two banks maximum
Over 160 Wh: prohibited on passenger flights

These rules apply on commercial passenger flights worldwide. Cargo flights have different rules but those don't concern passengers.

How to calculate watt-hours

The capacity is what matters, not the milliamp-hour rating directly. The conversion:

Watt-hours (Wh) = milliamp-hours (mAh) × volts (V) ÷ 1000

For consumer lithium-ion power banks, the internal cell voltage is 3.7 V (nominal). So:

10,000 mAh: 10,000 × 3.7 ÷ 1000 = 37 Wh (well under limit)
20,000 mAh: 74 Wh (under limit)
25,000 mAh: 92.5 Wh (under limit, marginal)
27,000 mAh: 99.9 Wh (under limit, just barely)
30,000 mAh: 111 Wh (over the 100 Wh threshold)
40,000 mAh: 148 Wh (in the 100-160 Wh approval zone)
50,000 mAh: 185 Wh (over the 160 Wh limit, prohibited)

The actual capacity printed on the bank label is what counts. Many banks print the Wh value directly; others only print mAh, in which case you do the math.

The carry-on rule, strictly

Power banks must be in your carry-on bag or person, not in checked luggage. The reason: if a lithium battery shorts and starts a thermal runaway fire, a passenger or crew member in the cabin can respond immediately. A fire in the cargo hold spreads further before detection.

If you accidentally pack a power bank in checked luggage and security catches it:

They'll remove the power bank for inspection
They may delay your bag while they handle it
You may need to retrieve it at the gate or destination, paperwork-dependent

If your bag was already loaded onto the aircraft when the issue is discovered, the entire bag is removed and your flight may be delayed while they unload and re-screen.

Airline-specific rules

The IATA rules are the floor; some airlines impose additional restrictions.

Major US airlines (American, Delta, United, Southwest, JetBlue)

Follow IATA rules exactly. 100 Wh limit, carry-on only. No notable additional restrictions.

Major European airlines (Lufthansa, Air France, KLM, British Airways, Ryanair)

Follow IATA rules. Some require power banks over 100 Wh to be pre-approved before booking; submit the bank model and capacity at least 48 hours before flight.

Asian airlines (Singapore, Cathay, ANA, JAL, Korean)

Mostly follow IATA rules with stricter enforcement at the gate. Singapore Airlines requires power banks above 100 Wh to be approved at check-in with a paper form; they're rigorous about checking.

Middle Eastern airlines (Emirates, Qatar, Etihad)

Strict adherence to IATA rules. Emirates allows power banks up to 32,000 mAh (about 120 Wh at 3.7 V) without approval on certain routes; otherwise standard 100 Wh limit applies.

Australian airlines (Qantas, Virgin Australia, Jetstar)

Standard IATA rules. Australian authorities are particularly strict about damaged or visibly worn power banks.

Low-cost carriers and regional airlines

Usually follow IATA rules but with stricter enforcement and less flexibility for approval requests. If you're flying a budget carrier, ensure your power bank is under 100 Wh to avoid hassle.

What about laptop batteries?

The 100 Wh limit applies to spare batteries, not batteries installed in your laptop. Your laptop's internal battery can be over 100 Wh without restriction. Two examples:

16-inch MacBook Pro: 100 Wh battery, installed, fine
Some gaming laptops: 90-99 Wh installed batteries, fine

Carrying a spare laptop battery has the same rules as a power bank: under 100 Wh in carry-on, no restrictions; 100-160 Wh needs approval; over 160 Wh prohibited.

Damaged or recalled power banks

Beyond the capacity rules, airlines uniformly ban:

Visibly damaged power banks (dented, swollen, cracked casing)
Power banks that have shorted or smoked previously
Power banks subject to manufacturer recall
Counterfeit or unbranded power banks from sketchy sources

Security agents in major airports are trained to spot signs of damage. If your bank looks worn or has marks suggesting impact damage, expect to be questioned.

How to fly safely with a power bank

Practical rules for safe travel:

Charge to about 50% before flying. Fully charged banks have higher fire risk if punctured or shorted.
Pack the power bank in the main compartment of your carry-on, not in an exterior pocket where it could be impacted.
Use a hard case or pouch to protect the bank from physical damage.
Don't pack power banks next to metal objects (keys, coins) that could short the contacts.
If your bank has a power switch, switch it off before packing.
Don't charge devices from the power bank during takeoff or landing, just for crew workload reasons, not regulation.

What to do if your power bank is over the limit

If you discover at the airport that your power bank is over 100 Wh:

Check if it's under 160 Wh: ask at the airline counter if they can approve it on the spot
If they can't approve it: ship the bank to your destination by FedEx or DHL (slow but legal)
Give it to a friend who isn't flying
As a last resort: ask the airline to dispose of it (they will, but you lose the bank)

Most travelers under-buy capacity to avoid this. A 20,000 mAh bank (74 Wh) is below the limit and handles most travel needs.

What power bank capacity do I actually need?

For travel purposes:

10,000 mAh (37 Wh): 2-3 phone charges. Fine for day trips, light for long-haul travel.
20,000 mAh (74 Wh): 5-6 phone charges or one laptop top-up. The sweet spot for most travelers.
25,000 mAh (92.5 Wh): 7-8 phone charges or one to two laptop top-ups. Right for digital nomads and long flight days.
27,000+ mAh: pushing the 100 Wh limit. Verify the actual Wh rating before relying on a single bank above 25,000 mAh.

For a 24-hour day with a laptop, phone, headphones, and tablet, a 25,000 mAh bank covers everything with margin. For a typical 8-hour travel day with mostly phone charging, a 10,000 or 20,000 mAh bank is enough.

The bottom line

Power banks fly carry-on, not checked, with a 100 Wh capacity limit for unrestricted carry. Most consumer banks under 25,000 mAh are below this limit; banks 25,000-30,000+ mAh may exceed it depending on cell voltage and design.

Check the Wh rating before flying. Keep the bank in carry-on. Don't carry damaged or shorted banks. Within those rules, power banks are routine on flights and customs almost never asks about them.