Can I Take My Power Bank on a Chinese Flight? Check Watt-Hours, Not mAh

You have probably heard this: "if it has the CCC mark and it is under 20,000 mAh, it is fine." That is not always true — and getting it wrong means watching your power bank go into a confiscation bin at security. Chinese aviation security does not check milliamp-hours. It checks watt-hours (Wh). THE THREE BANDS Below 100 Wh — ✅ Allowed. Straight through, no approval needed. 100 to 160 Wh — ⚠️ Needs airline approval. Ask at the check-in counter BEFORE security. Without the permit you can be sent back. Above 160 Wh — ❌ Banned entirely. Confiscated or refused. WHY 20,000 mAh CAN STILL BE TOO BIG mAh alone does not tell you the energy — you need the voltage too. Wh = (mAh ÷ 1000) × Voltage At 3.7V (the usual cell voltage), 20,000 mAh = 74 Wh, safely in the green zone. But plenty of newer fast-charge and laptop-rated banks run at 5.1V. The same 20,000 mAh at 5.1V = 102 Wh — that crosses into the yellow zone and needs a permit. So the "under 20,000 mAh" rule of thumb quietly fails on exactly the power banks people are most likely to own. HOW TO CHECK YOURS Look at the label on the back. Most decent units print the Wh value directly — use that number first, do not calculate. If Wh is not printed, use the formula with the voltage shown on the label. One more thing people miss: the label has to be legible. Even a power bank well under the limit can be refused if the printing is faded, blurry or missing. Check yours before you leave home. BEFORE YOU FLY Carry power banks in hand luggage only — they are banned from checked bags. If yours is large or fast-charge, ask at check-in: "Does this one need a permit?" Sorting it out at the counter takes a minute; being turned back at the security line can cost you the flight. On board, keep it switched off, do not bury it under thick bedding, and do not use it while it is charging. WHAT ABOUT THE CCC MARK? CCC (China Compulsory Certification) means the product meets Chinese safety standards for sale in China. It does NOT override the Wh limit. A certified 180 Wh bank is still banned; an uncertified 50 Wh one may still get questioned. Two things decide whether you board: the Wh number, and a readable label.

Can I Take My Power Bank on a Chinese Flight? Check Watt-Hours, Not mAh

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