Power banks are allowed in carry-on luggage on domestic flights in China, but they must be under the 100 watt-hour (Wh) limit and have their capacity clearly labeled. This is the single most important rule. While there's a conditional allowance for units between 100-160Wh with airline approval, it's impractical to arrange. Anything over 160Wh is strictly forbidden. Forget thinking in milliamp-hours (mAh); Chinese airport security bases their decision solely on the Wh rating and the physical legibility of that rating on the device itself.
Understanding the Watt-Hour (Wh) Limit
The Civil Aviation Administration of China (CAAC) regulates batteries based on their total energy capacity, measured in watt-hours (Wh). This is a universal standard, whereas the more common milliamp-hour (mAh) rating is meaningless without knowing the voltage. The formula is simple: Wh = (mAh / 1000) * Voltage (V).
Most commercial power banks operate at a standard 3.7V. Here’s how common sizes translate:
- 10,000mAh Power Bank: (10000 / 1000) * 3.7V = 37Wh. Perfectly acceptable.
- 20,000mAh Power Bank: (20000 / 1000) * 3.7V = 74Wh. Also well within the standard limit.
- 26,800mAh Power Bank: (26800 / 1000) * 3.7V = 99.16Wh. This is the largest size you can carry without needing special permission.
The official tiers are straightforward:
- Under 100Wh: You can carry up to two of these without any special approval.
- Between 100Wh and 160Wh: Limited to one per person and requires prior airline approval. This process is often cumbersome and not guaranteed, so it's best to avoid power banks in this range.
- Over 160Wh: Strictly prohibited from all aircraft, both carry-on and checked.
Carry-On Only, Never in Checked Luggage
This rule is absolute and non-negotiable. Power banks, known in Chinese as 充电宝 (chōngdiànbǎo), contain lithium-ion cells that pose a fire risk in the unpressurized cargo hold. They must be carried with you in the cabin.
At the security checkpoint, you will be required to remove all power banks from your bag and place them in a separate tray for screening, just like a laptop. If you accidentally leave one in your checked suitcase, your bag will be flagged by security scanners. Airport staff will then open your bag to locate and confiscate the item. This will not only cause delays but also means you will lose your power bank permanently. There is no system in place to hold it for you until you return. Always double-check your luggage before you head to the airport.
The Critical Importance of Clear Markings
This is the second most common reason travelers have their power banks confiscated. The capacity rating (either in Wh, or both mAh and V) must be printed on the device by the manufacturer and be completely legible.
If the markings have worn off from use, are covered by a decorative sticker, or were never there in the first place (as with some unbranded models), the power bank will be confiscated. Security staff will not take your word for its capacity. They operate under a “if we can't read it, it's a risk” policy. Before packing, inspect your power bank. If the text specifying its capacity is faded or scratched, it is much safer to travel with a different one. No exceptions are made for expensive or new devices if the rating cannot be clearly read.
The CCC Certification Myth for Foreign Tourists
Travelers often ask about the China Compulsory Certification (中国强制性产品认证, Zhōngguó Qiángzhìxìng Chǎnpǐn Rènzhèng), or CCC mark. This is a mandatory safety certification for many products sold within China. However, for a foreign tourist passing through an airport with a personal power bank bought overseas, this is not a practical concern.
Airport security's mandate is aviation safety, and their checklist is focused on two things: the Wh rating and ensuring the device is in your carry-on. They are not tasked with enforcing CCC compliance on personal items brought into the country. An Anker, Mophie, or Belkin power bank purchased in Europe or North America will not be confiscated simply because it lacks a CCC logo. As long as it meets the clear labeling and Wh-limit requirements, you will face no issues.
The most critical takeaway for flying with a power bank in China is that the rules are absolute: the capacity must be clearly marked and under 100Wh, and it must be in your carry-on. Have you ever had a power bank questioned or confiscated at a Chinese airport, and what was the specific reason security gave?
Quick Takeaways:
- Power banks must be in carry-on luggage and are forbidden in checked bags.
- The limit is 100 watt-hours (Wh); a 20,000mAh bank is usually well under this.
- Capacity markings (mAh and V, or Wh) must be clearly printed on the device.
- Power banks over 160Wh are strictly prohibited and will be confiscated.
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