Global flight baggage guide
Can a 20,000mAh power bank go on a plane?
Convert the label to Wh: mAh × voltage ÷ 1,000. A typical 20,000mAh 3.7V unit is 74Wh, but use its printed rating.
Scope
Calculation guidance only. Approval thresholds and the number of batteries are airline-specific.
Before-you-fly checklist
- 1Read the printed Wh or voltage.
- 2Use 20,000 × 3.7 ÷ 1,000 = 74Wh only when 3.7V is printed.
- 3Carry it in the cabin and check airline quantity rules.
Reviewed: 2026-09-09
Official sources
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Check a specific item
Rules vary by airline and route
Always verify important restrictions with your airline and the official security authority before departure.