⚡ Battery Watt-Hour Calculator Preset
40,000 mAh Power Bank on a Plane: 148 Wh Airline Limit
Calculated Rating
148.0 Wh
Based on 40,000 mAh at 3.7 V
⚠ Airline Approval Required (Max 2 Spares)
🔋 Battery watt-hour calculator
Power banks show mAh, airlines limit Wh. Under 100 Wh flies free in carry-on; 100–160 Wh needs airline approval.
Aviation Authority Verdict & Legal Citation
A 40,000 mAh battery produces 148.0 Watt-hours (Wh). It sits in the special 100.1–160 Wh category. You must obtain airline approval and carry a maximum of two spares in carry-on luggage only.
Governing Standard: FAA & IATA Dangerous Goods IATA Dangerous Goods Passenger Guidelines (100–160 Wh) ↗
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Frequently Asked Questions
Can I take a 40,000 mAh power bank in checked luggage?
Never. All spare lithium batteries over 100 Wh must travel in cabin baggage with terminal short-circuit protection.