China Power Bank Rules 2026: Metro and Airport Security Guide

Avoid confiscation: Learn the 100Wh limit and 3C certification rules for China's airports, trains, and metros.

Quick Answer: The 2026 Power Bank Essentials

For international travelers in China, the rules for carrying power banks (portable chargers) are strictly enforced at airports, high-speed railway stations, and metro entrances. As of 2026, the standard limits are:

Capacity Limit: Power banks under 100Wh (approx. 27,000mAh at 3.7V) are allowed without prior approval.
Approval Required: Units between 100Wh and 160Wh require airline or station approval. Anything over 160Wh is strictly prohibited.
Certification: Devices must have a visible 3C (China Compulsory Certificate) mark or clearly legible technical specifications (Wh, mAh, and Voltage). If the label is worn off or illegible, the device will be confiscated.
Carry-on Only: Power banks must be in your carry-on luggage. They are strictly forbidden in checked baggage due to fire risks.

Understanding the 100Wh Limit (Wh vs. mAh)

Most travelers measure power banks in milliampere-hours (mAh), but Chinese security personnel use Watt-hours (Wh). This is where many travelers get caught off guard.

How to Calculate Your Power Bank’s Wh

If your power bank only lists mAh, you can calculate the Wh using the following formula: Wh = (mAh × V) / 1000

Most lithium-ion power banks operate at a nominal voltage of 3.7V.

10,000mAh × 3.7V / 1000 = 37Wh (Safe)
20,000mAh × 3.7V / 1000 = 74Wh (Safe)
27,000mAh × 3.7V / 1000 = 99.9Wh (The upper limit for "no-questions-asked" travel)
30,000mAh × 3.7V / 1000 = 111Wh (Requires airline approval)

Capacity (at 3.7V)	Watt-hours (Wh)	Status
10,000 mAh	37 Wh	Allowed
20,000 mAh	74 Wh	Allowed
27,000 mAh	99.9 Wh	Allowed
30,000 mAh	111 Wh	Approval Needed
45,000+ mAh	166.5+ Wh	Prohibited

The "3C" Certification and Labeling Rule

In China, the 3C (CCC) mark is the national safety standard. For domestic travelers buying electronics within China, this mark is mandatory.

For International Travelers

If you purchased your power bank outside of China (e.g., an Anker or Apple product from Europe or the US), it likely won't have the 3C logo. In 2026, security officers at major hubs like Shanghai Pudong (PVG) or Beijing Capital (PEK) are generally trained to accept international safety marks (like CE or UL) provided the technical specifications are clearly printed on the device.

The Critical Failure Point: If your power bank is old and the text has rubbed off, or if it is a "no-name" brand without a clear manufacturer label, it will be confiscated. Security staff will not take your word for it; they must be able to read the Wh or the mAh/Voltage combination to verify it meets safety standards.

Airport Security: Domestic vs. International Segments

One of the most common ways travelers lose their power banks is during domestic transfers.

Arriving Internationally: When you land in China from abroad, you typically do not go through a security screening that checks your carry-on electronics before exiting the airport.
Domestic Transfers: If you fly from London to Shanghai and then catch a connecting flight to Chengdu, you must pass through domestic security. This is where your power bank will be inspected.
Departing China: When leaving China for an international destination, domestic rules apply. Your power bank will be checked at the first security checkpoint.

Quantity Limit: Generally, each passenger is limited to two power banks. If you are carrying three or more, even if they are all under 100Wh, security may ask you to leave the extras behind.

Metro and High-Speed Rail (HSR) Rules

China’s railway and metro systems have harmonized their security protocols with aviation standards, though enforcement can feel even more frequent because every metro station in major cities has a bag scanner.

High-Speed Rail (China Railway 12306)

According to the official China Railway (12306) passenger service rules, lithium-ion batteries and power banks are permitted but must be for personal use and clearly labeled. The 100Wh limit is the standard benchmark here as well. At major stations like Beijing West or Shanghai Hongqiao, security is high-volume; they may not check every power bank's label, but if they pull your bag for a secondary inspection, the label is the first thing they look for.

City Metro Systems

In cities like Beijing, Shanghai, Guangzhou, and Shenzhen, every single entry into the metro requires a bag scan.

Beijing Metro: Known for the strictest security. They may occasionally ask you to take the power bank out to verify the capacity.
Shanghai Metro: Generally faster, but they are strict about "unlabeled" or DIY battery packs.
Local Insight: If you are carrying a very large power bank (near the 100Wh limit), keep it in an easily accessible pocket of your bag. If security flags it, being able to show the label quickly prevents you from holding up the line and reduces the chance of a more invasive search.

Tripilot Planning Tip

Before you head to the airport or train station, use Tripilot to set a "Pre-Trip Reminder" for your electronics. You can note down the Wh of your specific power bank model in your itinerary notes. This ensures you don't accidentally pack a high-capacity unit (like those meant for laptops) that exceeds the 160Wh limit, which would be confiscated at the first security gate.

What to Do if Your Power Bank is Confiscated

If security determines your power bank is over the limit or lacks a clear label, you generally have three options:

Abandon it: This is the most common outcome. You sign a waiver, and the device is disposed of.
Give it to a friend: If someone is seeing you off and hasn't passed security yet, you can hand it to them.
Temporary Storage: Some major airports (like PEK or CAN) offer storage services for a fee, where you can leave the item and pick it up upon your return. However, this is rarely practical for one-way travelers.

Note: Do not attempt to hide a power bank in your checked luggage after it has been rejected at carry-on security. Checked bags are scanned, and if a lithium battery is found, your bag will be pulled, you will be called back to security, and you may miss your flight.

Local Backup: China’s Power Bank Rental Network

If your power bank is confiscated or you prefer not to carry one, China has the world's most sophisticated power bank rental network. You do not need to own a power bank to stay charged in China.

Where to Find Them

Look for kiosks with brands like Jiedian (街电), Monster (怪兽充电/Guai Shou), or Meituan (美团). They are located in:

Metro Stations: Near exits (e.g., Tiananmen East in Beijing, Nanjing East in Shanghai).
Restaurants/Cafes: Starbucks, Luckin Coffee, and Haidilao almost always have them.
Malls & Airports: Near rest areas and baggage claims.

How to Rent

Apps: You will need WeChat or Alipay.
Scan: Scan the QR code on the machine.
Deposit: If your Alipay/WeChat "credit score" (Zhima Credit) is high enough, the deposit is waived. Otherwise, you pay a small deposit (usually 99 RMB) via the app.
Return: You can return the power bank to any station belonging to the same brand across the city.

Summary Checklist for 2026 Travel

Check the Label: Is the Wh or mAh/V clearly legible? If not, buy a new one before the trip.
Verify Capacity: Is it under 100Wh? (Under 27,000mAh is the safe zone).
Pack in Carry-on: Never put it in your checked suitcase.
Limit Quantity: Carry no more than two units per person.
Domestic Transfers: Remember that your power bank will be re-inspected when transferring from an international to a domestic flight.

By following these guidelines, you can ensure your electronics stay with you throughout your journey across China's impressive transport network.

FAQ

Q: Can I bring a laptop power bank? A: Most laptop power banks are right at the 99Wh limit to comply with international flight rules. However, some "pro" models are 120Wh or higher. These will require airline approval and may be rejected at metro or train security if the staff is strictly following the 100Wh baseline.

Q: Does the 3C rule apply to my phone or laptop? A: No, the 3C inspection at security is specifically focused on power banks (external batteries) because they are considered high-risk items. Your phone and laptop are generally fine as long as they are for personal use.

Q: What if my power bank is 100Wh exactly? A: 100Wh is the threshold. Usually, "not exceeding 100Wh" means 100Wh is acceptable. To be safe, most travelers stick to the 20,000mAh (74Wh) models which are never questioned.

Q: Are there power bank rentals at the airport? A: Yes, most major Chinese airports have rental kiosks in the arrival halls and near the gates. If yours is confiscated on arrival/transfer, you can easily rent one for your stay.

Sources:

FAQ

What is the maximum mAh for power banks in China?

The limit is based on Watt-hours (Wh). For a standard 3.7V battery, 100Wh is approximately 27,027mAh. Most 20,000mAh power banks are well within the limit (74Wh).

Can I put my power bank in my checked luggage in China?

No. Power banks are strictly prohibited in checked luggage at all Chinese airports and train stations. They must be carried in your hand luggage.

What happens if my power bank doesn't have a label?

If the capacity (Wh or mAh) is not clearly printed on the device, it will be confiscated by security at airports, train stations, and some metro stations.

Is the 3C certification required for foreign travelers?

While 3C is the Chinese standard, security will accept international power banks if they have clear technical specs and international safety marks like CE. However, domestic-bought power banks must have the 3C mark.