Can You Bring Power Banks on a Plane?

Yes — but only in carry-on luggage. Power banks are prohibited from checked luggage on every commercial airline worldwide. Under 100 Wh, you can carry one without any airline approval. Larger units have restrictions.

The Core Rule: Carry-On Only

This is the most important fact about flying with a power bank: it must be in your carry-on bag or on your person. No power bank, of any capacity, may be placed in checked luggage.

Why: Lithium-ion batteries can experience thermal runaway — a rapid, self-sustaining internal fire. In the passenger cabin, the crew can see smoke and respond with fire suppression equipment. In a pressurised cargo hold, a lithium fire may go undetected until serious damage occurs. Aviation authorities worldwide have banned lithium battery items from checked baggage on these grounds.

This rule is enforced globally — it applies on every airline, in every country, for every power bank.

Capacity Limits

Capacity is measured in watt-hours (Wh). Most power banks list Wh on the label. If yours only shows mAh, you can calculate it.

Formula: Wh = mAh x voltage / 1000

Most lithium-ion power banks run at 3.7V nominal. Example: 10,000 mAh x 3.7 / 1000 = 37 Wh.

Capacity	Carry-On Allowed	Approval Needed
Under 100 Wh	Yes	No
100–160 Wh	Yes	Airline must approve in advance
Over 160 Wh	No	Banned from carry-on and hold

Common Power Banks by Wh Rating

Power Bank Capacity	Approximate Wh	Status
5,000 mAh	~18.5 Wh	Fine, no approval
10,000 mAh	~37 Wh	Fine, no approval
20,000 mAh	~74 Wh	Fine, no approval
26,800 mAh	~99 Wh	Fine, right at the limit
30,000 mAh	~111 Wh	Needs airline approval
40,000 mAh	~148 Wh	Needs airline approval
50,000 mAh+	~185+ Wh	Banned

The Wh figure printed on the power bank label is authoritative. If the label says 99.9 Wh, that is under 100 Wh and requires no approval.

Quantity Limits

Most airlines follow IATA guidelines limiting passengers to 2 spare lithium batteries or power banks in carry-on. Some airlines set no quantity limit, but 2 is the safe maximum to assume.

"Spare" means a battery not currently installed in a device. A phone with a built-in battery does not count against this limit. Only portable power banks and detachable batteries count.

If you carry 2 power banks and 2 spare laptop batteries, that is 4 spare batteries total — check your airline's policy before travel.

How to Get Airline Approval for 100–160 Wh Power Banks

Airlines that allow 100–160 Wh power banks (two maximum) typically require:

1. Contact the airline before your trip — not at the gate.
2. State the brand, model, and exact Wh rating.
3. Most airlines confirm via email or note on your booking. Keep the confirmation.

Airline contact typically means the reservations line or the dangerous goods desk. Gate agents cannot grant approval on the day.

Airlines With Strict Enforcement

China Southern, Air China, Hainan Airlines: strictly enforce the 2-unit limit and have been known to remove oversized power banks at boarding gates in Chinese airports.

Emirates, Qatar Airways, Etihad: follow IATA rules closely. Power banks over 160 Wh have been confiscated at Middle Eastern hubs.

If you are connecting through a hub where you did not originate your flight, the connecting carrier's rules apply.

Practical Tips

• Keep your power bank in an accessible pocket of your carry-on — not buried inside.
• At some Asian airports, security may ask you to turn it on to verify it is functional (a dead power bank may be flagged).
• Buy a power bank that shows Wh on the label. Some budget units only show mAh — calculate before you travel.
• For long-haul trips, a 20,000 mAh (74 Wh) unit covers most travellers without any capacity concerns.

Summary

Rule	Detail
Checked luggage	Prohibited — no exceptions
Carry-on, under 100 Wh	Allowed, no approval
Carry-on, 100–160 Wh	Allowed with airline pre-approval
Carry-on, over 160 Wh	Prohibited
Quantity limit	2 per passenger (most airlines)
How to calculate Wh	mAh x 3.7 / 1000