⚡ Battery Watt-Hour Calculator Preset
20,000 mAh Power Bank on a Plane: Watt-Hour & Airline Rules
Calculated Rating
74.0 Wh
Based on 20,000 mAh at 3.7 V
✓ Carry-On Permitted — Standard Maximum
🔋 バッテリー ワット時定格量 (Wh) 計算機
モバイルバッテリーの多くはmAh表記ですが、航空会社の制限基準はワット時 (Wh) です。100Wh以下は機内持込自由、100〜160Whは航空会社の事前承認が必要です。
Aviation Authority Verdict & Legal Citation
A 20,000 mAh battery equals 74.0 Watt-hours (Wh) at 3.7 V. This is the most popular high-capacity travel size because it charges phones 4–5 times while staying comfortably under the 100 Wh airline ceiling. Carry-on only, never in checked luggage.
Governing Standard: FAA PackSafe & TSA Regulations FAA PackSafe for Passengers: Portable Electronic Devices ↗
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Frequently Asked Questions
Will airport security question a 20,000 mAh battery?
No, 20,000 mAh (74 Wh) is routinely passed at security checkpoints worldwide. Keep the printed manufacturer label legible.
What happens if my carry-on bag is gate-checked?
You must remove your 20,000 mAh power bank from the bag and carry it into the aircraft cabin before handing the bag over.