Yes, you can bring a power bank on a flight in China, but only if it's in your carry-on luggage and meets strict capacity and labeling rules. China's airport security regulations are rigorously enforced, and the most common reason foreigners have power banks confiscated is because the capacity isn't clearly marked or exceeds the limit. Understanding these specific rules is crucial to avoid losing your device at the security checkpoint, known as 安检 (ānjiǎn).
The Core Rule: Watt-hours (Wh), Not mAh
The biggest point of confusion for international travelers is the unit of measurement. While most of the world markets power banks using milliampere-hours (mAh), the Civil Aviation Administration of China (CAAC) bases its rules on Watt-hours (Wh), which measures energy capacity. If your power bank only lists mAh, you must be able to calculate the Wh for security personnel.
The formula is: Watt-hours (Wh) = (mAh / 1000) x Voltage (V)
Most power banks have a standard output voltage of 3.7V or 5V. This information must be printed on the device. For example, a common 20,000mAh power bank with a 3.7V output is 74Wh, which is perfectly acceptable. A 10,000mAh unit is usually well under the limit.
The specific limits are:
- Up to 100Wh: You can carry these without any special permission. Most travelers should aim for power banks in this range to ensure a smooth security check.
- 100Wh to 160Wh: These are considered larger capacity and require airline approval before you can bring them on board. Gaining this approval at the check-in counter can be difficult and time-consuming, and permission is not guaranteed. It is far safer to avoid this category altogether.
- Over 160Wh: These are strictly forbidden in both carry-on and checked luggage.
Clear Markings are Non-Negotiable
This is the rule that catches most people off guard. Your power bank must have its capacity specifications clearly printed and legible on the casing. If the label has worn off, is scratched, or was never there in the first place (a common issue with cheap, unbranded models), it will be confiscated on the spot. No exceptions are made.
Airport security staff will not accept your word for the capacity, nor will they look it up online. The information must be physically present on the device itself. Before you travel, double-check your power bank. If the markings are faded, it’s best to buy a new one from a reputable brand where the specs are clearly etched or printed.
Carry-on Only, Never Checked Luggage
Under no circumstances should you ever place a power bank or any spare lithium-ion batteries in your checked baggage. This is a universal aviation rule due to fire safety risks, and it is strictly enforced in China. All power banks must be transported in your carry-on baggage (随身行李, suíshēn xínglǐ).
If a power bank is detected in your checked luggage during X-ray screening, your bag will be flagged. This will either lead to you being called to open your bag to remove the item, causing significant delays, or security will open the bag and discard the item. In some cases, the bag may miss the flight entirely. It is generally permissible to carry up to two separate power banks per person, as long as each one independently meets the capacity and labeling requirements.
Ultimately, adhering to the 100Wh limit and ensuring your device is clearly labeled will prevent nearly all potential issues at Chinese airport security.
Have you ever had an item confiscated at a Chinese airport, and what was the specific reason security gave you?
Quick Takeaways:
- Your power bank must be in your carry-on and have a capacity under 100Wh.
- The capacity in Wh (or mAh and V) must be clearly printed on the device.
- Power banks between 100Wh and 160Wh need prior airline approval to be carried.
- Never put power banks in checked luggage; they will be found and removed.
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