Can I bring 2 power banks on a plane?

Yes. For power banks under 100Wh there is generally no per-passenger limit on the number you can carry in your carry-on, though each must be individually under 100Wh and protected from short-circuiting (keep them in original packaging or a pouch, with terminals covered). For larger banks rated 100–160Wh, most airlines allow a maximum of 2 per passenger and require advance approval. Banks over 160Wh are banned entirely.

Can I use a power bank during the flight?

In most cases you can charge a device from a power bank in the cabin, but in 2025–2026 a growing number of airlines now require power banks to be kept accessible and NOT used or charged inside the seat pocket or overhead bin. Some carriers ask that you keep the bank in view (on your tray or in the seatback in front of you) while it's in use so any overheating is noticed quickly. This is an evolving rule — check your specific airline's current policy before you fly.

What if my power bank is over 100Wh?

Power banks rated 100–160Wh require airline approval before you fly, and most carriers limit you to 2 such batteries in carry-on. Anything over 160Wh is forbidden on passenger aircraft entirely. A 27,000mAh+ bank can cross the 100Wh line, so check the printed Wh rating (most banks state it on the label). If yours exceeds 100Wh, contact the airline in advance — don't just show up at the gate.

Does a power bank need to be in my carry-on?

Yes — power banks must be in carry-on (cabin) baggage and are prohibited in checked luggage. This is a hard FAA/IATA rule, not an airline preference. If a gate agent requires you to check your carry-on bag at boarding (e.g. a full overhead), you must remove any power banks and keep them on your person in the cabin.

How do I convert mAh to watt-hours (Wh)?

Use Wh = (mAh ÷ 1000) × 3.7V, where 3.7V is the nominal voltage of a lithium-ion cell. So 10,000mAh ≈ 37Wh, 20,000mAh ≈ 74Wh, and 26,800mAh ≈ 99Wh (the practical maximum that stays under 100Wh). Airlines regulate by Wh, not mAh, so this conversion is what determines whether your bank is allowed. Many banks now print the Wh rating directly on the casing.

Do power bank rules differ internationally?

The core thresholds (100Wh no-approval, 100–160Wh with approval, 160Wh+ banned) come from IATA Dangerous Goods Regulations and are followed broadly worldwide — the US (TSA/FAA), EU (EASA), and most major carriers all use them. However, individual airlines and countries layer on their own rules: some cap the number of spare batteries, and several airlines in 2025–2026 added restrictions on using power banks in flight. Always check both the airline and the departure country's rules before traveling.

Do I need to declare my power bank at security or to the airline?

For a standard power bank under 100Wh, you don't need to declare it — just keep it in your carry-on. At the TSA checkpoint you may be asked to remove larger electronics, but power banks themselves usually stay in the bag. Declaration and advance approval are only required for batteries rated 100–160Wh. Banks over 160Wh cannot be brought at all, declared or not.

Why can't power banks go in checked luggage?

Lithium-ion batteries can overheat and catch fire (thermal runaway), and a fire in the cargo hold is unreachable by the crew and not covered by the cabin's fire-suppression systems. In the cabin, a malfunctioning battery can be spotted and dealt with immediately. That's why the FAA and IATA require all spare lithium batteries and power banks to travel in carry-on only.

Is a 20,000mAh power bank allowed on a plane?

Yes. A 20,000mAh bank is approximately 74Wh — comfortably under the 100Wh limit — so it's allowed in carry-on with no airline approval needed. The same is true of 10,000mAh (~37Wh) banks. You only need to start checking ratings carefully once you approach 26,800mAh (~99Wh) and above, where some high-capacity banks can exceed 100Wh.

Last updated: June 2026

Can I Bring a Power Bank on a Plane?

Q: Can I bring a power bank on a plane?

Yes — but only in your carry-on bag, never in checked luggage. Power banks contain lithium-ion batteries, which the FAA and IATA prohibit in the cargo hold because a fire there cannot be reached or extinguished by the crew. The size limit is measured in watt-hours (Wh): up to 100Wh is allowed with no airline approval (this covers virtually every consumer power bank, including 10,000mAh and 20,000mAh models). Always keep the bank in the cabin with you.

Walter BartetUSB-C Research SpecialistUpdated June 20267 min read

Quick Answer

Yes — you can bring a power bank on a plane, but only in your carry-on bag, never in checked luggage. Power banks are lithium-ion batteries, and the FAA and IATA ban them from the cargo hold. The size limit is measured in watt-hours (Wh), not mAh: up to 100Wh is allowed with no airline approval (this covers virtually every consumer bank, including 10,000mAh and 20,000mAh models). Banks rated 100–160Wh need airline approval (usually a maximum of 2), and anything over 160Wh is banned.

The Watt-Hour Rule

Airlines regulate by watt-hours. To convert your bank's capacity:

Wh = (mAh ÷ 1000) × 3.7V

10,000mAh ≈ 37Wh — allowed in carry-on, no approval
20,000mAh ≈ 74Wh — allowed in carry-on, no approval
26,800mAh ≈ 99Wh — the practical maximum that stays under 100Wh
27,000mAh+ — may exceed 100Wh; check the printed Wh rating and get approval

The Rules in Detail (TSA / FAA / IATA, 2026)

Power banks are spare lithium-ion batteries, and every major aviation authority treats them the same way. The two rules that matter most are simple:

Carry-on only, never checked. A lithium battery fire in the cargo hold cannot be reached or extinguished by the crew. In the cabin, a malfunction can be spotted and handled immediately. This is a hard FAA/IATA rule.
The limit is 100Wh without approval. Up to 100Wh: no approval needed. 100–160Wh: airline approval required, usually max 2 per passenger. Over 160Wh: banned on passenger aircraft.
Protect the terminals. Keep banks in original packaging or a pouch so the ports can't short-circuit against keys or coins. Several airlines now require this for spare batteries.

New for 2025–2026: a growing number of airlines now require power banks to be kept accessible and NOT used or charged inside the seat pocket or overhead bin — some ask that the bank stay in view on your tray while charging so overheating is noticed quickly. This is an evolving rule that varies by carrier, so check your specific airline's current policy before you fly.

Is My Power Bank Airline-Legal? (Capacity → Wh → Allowed)

Find your bank's capacity below. All values assume a 3.7V lithium-ion cell. When in doubt, read the Wh rating printed on the bank itself — it's the number airlines actually check.

Capacity (mAh)	Watt-hours (Wh)	Carry-on Status	Notes
5,000mAh	~18.5Wh	Allowed (carry-on)	No approval needed
10,000mAh	~37Wh	Allowed (carry-on)	No approval needed — safest
20,000mAh	~74Wh	Allowed (carry-on)	No approval needed
26,800mAh	~99Wh	Allowed (carry-on)	Practical maximum — right at the line
27,000mAh+	100Wh+	Approval required / may be banned	100–160Wh needs airline approval (usually max 2); over 160Wh is banned

Bottom line: nearly every power bank you can buy as a consumer (5,000–26,800mAh) is under 100Wh and allowed in carry-on with no approval. You only need to think twice at the very high end (27,000mAh+).

3 Airline-Legal Power Banks We Recommend for Flying

Every pick below is well under the 100Wh limit, so it flies in your carry-on with zero airline approval. We note each bank's watt-hours and exactly why it's airline-legal. See our full laptop power bank guide for more options.

SAFEST / SIMPLEST CARRY-ON PICK$25.99~37Wh · airline-legal

Anker PowerCore 10,000mAh

10,000mAh ≈ 37Wh — well under the 100Wh limit, allowed in carry-on with zero airline approval
Pocket-sized and light — fits in a jacket pocket or seatback bag
USB-C input/output for phones, earbuds, and small tablets
1.5–2 full charges for most modern phones
No checked-bag worry: keep it in your carry-on every time

Pros

+37Wh is far below the 100Wh cap — the most worry-free option for any airline worldwide
+Small and light enough that you'll actually carry it through security without a second thought
+Inexpensive — easy to replace if lost during travel

Cons

−10,000mAh won't fully charge a laptop — it's a phone-and-tablet top-off bank
−Single high-power output — not a multi-device charging hub

Best for: Travelers who just want a phone top-off that is guaranteed airline-legal everywhere and never has to be thought about at security.

Who should skip: Anyone who needs to charge a laptop in flight. For a laptop, step up to a 100W bank below (still under 100Wh).

At roughly 37Wh, this bank sits so far below the 100Wh threshold that no airline on earth will question it. It's the simplest possible answer to "can I bring this on a plane?" — yes, in your carry-on, every time.

See Current Price on Amazon

SMALLEST + 45W USB-C$24.99~37Wh · airline-legal

INIU Ultra Compact 10,000mAh 45W

10,000mAh ≈ 37Wh — comfortably under the 100Wh carry-on limit, no approval needed
45W USB-C Power Delivery — fast-charges phones and tops off small laptops in a pinch
One of the thinnest 10,000mAh banks available — credit-card footprint
USB-C and USB-A outputs to charge two devices at once
Light enough to live permanently in a travel bag

Pros

+45W USB-C is unusually fast for a bank this small — useful for fast phone and tablet charging
+37Wh keeps it firmly airline-legal in carry-on on any carrier
+Slim profile slides into a passport wallet or seatback pocket easily

Cons

−10,000mAh is light on capacity for a full laptop charge
−45W tops off a laptop slowly — fine for emergencies, not a primary laptop charger

Best for: Frequent flyers who want the smallest possible bank that still fast-charges a phone and can nudge a laptop along — all while staying airline-legal.

Who should skip: Travelers who regularly run a laptop off battery for hours — you'll want the 20,000mAh 100W bank below for real laptop runtime.

The INIU packs 45W USB-C into one of the slimmest 10,000mAh shells you can buy, and at ~37Wh it's never a problem at security. It's the bank to grab when carry-on space and weight matter most.

See Current Price on Amazon

MAX AIRLINE-LEGAL CAPACITY + 100W$56.99~74Wh · airline-legal

UGREEN 20,000mAh 100W Power Bank

20,000mAh ≈ 74Wh — still comfortably under the 100Wh limit, allowed in carry-on with no approval
100W USB-C output — charges most 14" laptops at or near full speed
Charges a laptop, phone, and earbuds together from multiple ports
About 1 full laptop charge or several phone charges per trip
The practical sweet spot: maximum useful capacity that's still hassle-free at security

Pros

+100W output is enough to run and charge most ultrabooks during a flight
+74Wh leaves a clear margin under the 100Wh cap — no airline approval required
+Big enough for a full day of devices without recharging the bank itself

Cons

−Heavier and bulkier than the 10,000mAh picks — it's a backpack bank
−At 74Wh it's near (but safely under) the limit — don't confuse it with 26,800mAh+ banks that can exceed 100Wh

Best for: Travelers who need real laptop runtime in the air and want the most capacity that's still comfortably airline-legal without paperwork.

Who should skip: Light packers who only top off a phone — the 10,000mAh banks above are half the weight and just as legal.

At ~74Wh, the UGREEN 20,000mAh hits the practical maximum: enough 100W power to charge a laptop, yet far enough below 100Wh that no gate agent will blink. It's the best balance of capacity and travel simplicity.

See Current Price on Amazon

Power Banks on Planes: FAQ

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Summary

You can bring a power bank on a plane, but only in carry-on baggage — never in checked luggage, because lithium-ion batteries are banned from the cargo hold by the FAA and IATA. The limit is measured in watt-hours, not mAh: up to 100Wh needs no approval, 100–160Wh needs airline approval (usually max 2), and over 160Wh is banned. Convert with Wh = (mAh ÷ 1000) × 3.7V, so 10,000mAh ≈ 37Wh, 20,000mAh ≈ 74Wh, and 26,800mAh ≈ 99Wh (the practical maximum). Nearly all consumer power banks are under 100Wh and fly freely in carry-on. In 2025–2026, several airlines added rules requiring power banks to be kept accessible and not used inside seat pockets or overhead bins — check your carrier's current policy before flying.