What watt-hour rating is safe to source?
Why power banks can't go in checked luggage
How this applies to smart luggage with a built-in power bank
What certification should a power bank supplier provide?
What if you're selling into the Chinese market?
What changed in 2026 that buyers should know?

A power bank can fly if it's 100 watt-hours (Wh) or under, in the cabin instead of checked baggage and comes with a UN38.3 test report. Airlines regulate power banks this closely because lithium batteries can catch fire if they're damaged or overheated. The same rules apply to smart luggage, since a built-in power bank is still a lithium battery - get the sourcing wrong and it isn't just a charger that gets turned away at the gate, it's the whole bag. 2026's new airline rules add a few more things buyers need to check.
Watt-hours (Wh), not mAh, is the number every airline checks. Here's how the tiers break down:

To get Wh from mAh: divide mAh by 1000, then multiply by the cell's voltage (3.7V for standard lithium-ion). A 20,000mAh power bank works out to about 74 Wh. If a supplier only gives you mAh, ask for the Wh figure directly and check it matches what's printed on the product itself.
Because it's a fire-safety rule. The International Air Transport Association (IATA), the US Federal Aviation Administration (FAA) and national aviation authorities everywhere treat power banks as loose lithium batteries and loose lithium batteries are barred from the cargo hold at any capacity.
Simply, a battery fire in the cabin can be spotted and handled by crew in seconds. A fire in the hold can go undetected until it's much harder to put out. Whatever you're sourcing, this rule applies the same way in every market.
Under IATA's guidance on smart baggage, a battery built into a suitcase can never be treated as fixed. If the bag has to be checked planeside, the battery has to come out and travel in the cabin, so the design has to make that possible.
Ask for three things:
A UN38.3 test report proves the battery can be transported safely by air, sea or road. Every airline, freight forwarder and customs authority worldwide requires it. This is the one to request from any supplier, anywhere. A proper UN38.3 test report should name the manufacturer, the test lab, a report ID and date, the battery's Wh rating and model number and which tests it passed.

Global rules cover shipping and flying with a power bank almost anywhere, but China adds one extra domestic step worth knowing if your buyers sell there. Since 28 June 2025, the Civil Aviation Administration of China (CAAC) has required every power bank carried on a domestic Chinese flight to show a valid CCC mark (also called the 3C mark), China's own compulsory safety certification. Power banks without it are turned away at the gate.

This sits alongside UN38.3, not in place of it. If you're supplying power banks or smart luggage for the China market, ask your supplier whether the product already carries CCC certification, since it's a separate application from UN38.3 or CE.

The Wh limits haven't changed, but airlines are stricter around them, following onboard battery fires:
Is a 100 Wh power bank allowed on every airline?
Yes, under 100 Wh needs no airline approval anywhere. Some airlines now add their own limits on where you can store it or whether you can use it in-flight, so it's worth checking the specific carrier too.
Do I need different certifications for different markets?
Yes. UN38.3 is required everywhere a battery is shipped or flown. Electrical and radio approvals are separate and market-specific - CE in the EU, FCC in the US, CCC in China. Ask your supplier which they hold and which they'd need to add.
Can a power bank travel in checked luggage instead of carry-on?
No. Power banks and any removable lithium battery travel in the cabin only, never checked, on every major airline. That's why smart luggage batteries need to be removable rather than built in.
What's the difference between UN38.3 and IEC 62133?
UN38.3 proves a battery can be shipped safely. IEC 62133 proves it's safe to use. A complete supplier file should include both.
Do I need a CCC mark to sell power banks in China?
Yes, if the product will be carried on a domestic Chinese flight. Since June 2025, CAAC requires a CCC (3C) mark for power banks on domestic routes, in addition to UN38.3.