Can I Fly with a 20000mAh Power Bank on ANA (All Nippon Airways)?
Updated 2026-08-02 · Power Bank Guide
Travelers often ask, “Can I fly with a 20000mAh power bank on ANA airlines power bank rules?” The short answer is yes—if you follow the FAA’s 100 Wh limit and keep the charger in your carry‑on. This guide breaks down the math, the TSA/FAA regulations, and what you can expect from a 20000 mAh (≈74 Wh) unit on a typical international flight.
Understanding the 100 Wh Limit
The Federal Aviation Administration (FAA) caps spare lithium‑ion batteries at 100 watt‑hours (Wh) for carry‑on luggage. Anything above 100 Wh must be approved by the airline and is usually prohibited in checked baggage because of fire risk. The rule applies to all airlines, including All Nippon Airways (ANA), so the same limit governs your power bank on any ANA flight.
How to Convert 20000 mAh to Watt‑Hours
Power banks are rated in milliamp‑hours (mAh) at a nominal cell voltage of 3.7 V. To get watt‑hours, use the formula:
- Wh = (mAh ÷ 1,000) × Voltage
For a 20000 mAh pack: (20 000 ÷ 1,000) × 3.7 V = 20 × 3.7 = 74 Wh. At 74 Wh the unit is well under the 100 Wh ceiling, so it can be taken on board without special airline approval.
Carry‑On vs. Checked Baggage
The FAA requires all spare lithium‑ion batteries—including power banks—to be carried in the cabin. Checked baggage is off‑limits because a fire inside the cargo hold is harder to detect and extinguish. On ANA flights, you must place the 20000 mAh charger in your personal item or carry‑on bag and keep it readily accessible.
What the 20000 mAh Bank Actually Powers
Real‑world efficiency for lithium‑ion cells is about 60‑70 % after accounting for voltage conversion and heat loss. A 20000 mAh (74 Wh) pack therefore delivers roughly 45‑52 Wh usable energy.
Typical smartphone batteries:
- iPhone 17 – 3,500 mAh (≈12.95 Wh)
- Samsung Galaxy S24 – 4,800 mAh (≈17.8 Wh)
- Google Pixel 8 – 4,400 mAh (≈16.3 Wh)
Based on the usable 45‑52 Wh, you can expect:
- 3‑4 full charges for an iPhone 17
- 2‑3 charges for a Samsung Galaxy S24
- 2‑3 charges for a Google Pixel 8
These numbers will vary with screen brightness, usage while charging, and any power‑draw from accessories.
USB‑C Power Delivery and Charging Speed
The INIU 20000mAh Portable Charger (Flight‑Safe) provides 22.5 W USB‑C PD output. At 22.5 W, a typical 5 V/2 A fast‑charge phone (10 W) will top up in roughly half the time of a standard 5 V/1 A charger. For PD‑compatible devices, the charger can deliver up to 5 V × 4.5 A or 9 V × 2.5 A, which is sufficient to bring most modern phones from 0 % to 80 % in about 30‑45 minutes.
If you need to charge a laptop, the 22.5 W output will handle small ultrabooks (e.g., 13‑inch MacBook Air) but not high‑power notebooks. Always check your device’s input rating before expecting full‑speed charging.
ANA’s Specific Policy and International Considerations
ANA follows the global FAA guidelines, but it also lists its own battery policy on the airline’s website. The key points are:
- All spare lithium‑ion batteries ≤100 Wh are allowed in carry‑on only.
- Battery terminals should be protected from short‑circuit (e.g., keep them in the original packaging or tape over the contacts).
- Travelers may be asked to remove the power bank for inspection at security checkpoints.
When flying internationally, remember that other jurisdictions (e.g., the European Union) adopt the same 100 Wh rule, but some airlines add their own paperwork for batteries between 100 Wh and 160 Wh. Since a 20000 mAh bank stays under 100 Wh, you won’t need extra forms on any route, but always double‑check the latest policy on ANA’s site before departure.
Best Flight‑Safe Choice
If you’re looking for a reliable, airline‑approved charger, the INIU 20000mAh Portable Charger (Flight‑Safe) checks all the boxes. It meets the 100 Wh limit, fits easily in a backpack, includes a USB‑C cable, and even has a built‑in flashlight—useful for jet‑lagged arrivals. Its 22.5 W fast‑charging capability pairs well with most smartphones and small tablets, making it a practical companion for any ANA itinerary.
FAQ
Can I bring a 20000 mAh power bank in my checked luggage?
No. Both the FAA and ANA require all spare lithium‑ion batteries under 100 Wh to be carried in the cabin. Checked baggage is prohibited for safety reasons.
What if my power bank is rated in mAh but I don’t know the voltage?
Most power banks use a 3.7 V nominal cell voltage. Use the formula Wh = (mAh ÷ 1,000) × 3.7 V to verify the watt‑hour rating. If the manufacturer lists a different voltage, adjust the calculation accordingly.
Do I need airline approval for a 20000 mAh charger on a ANA flight?
Since a 20000 mAh unit is about 74 Wh, it falls below the 100 Wh threshold and does not require special approval. Just keep it in your carry‑on and be prepared to show it at security if asked.