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Battery Watt-Hour (Wh) Calculator

Les banques d’alimentation affichent des mAh, les compagnies limitent les Wh. Moins de 100 Wh : libre en cabine ; 100–160 Wh : approbation requise.

🔋 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.

Foire aux questions

Frequently asked questions

How do you calculate Watt-hours (Wh) from mAh and Volts?

Formula: (mAh × V) ÷ 1,000 = Wh. For example, a 20,000 mAh power bank at 3.7V nominal is (20,000 × 3.7) ÷ 1,000 = 74 Wh.

What is the maximum battery size allowed on passenger planes?

Up to 100 Wh is freely permitted in carry-on bags. 100 Wh to 160 Wh requires airline approval (limit 2 spares). Over 160 Wh is strictly prohibited on passenger flights.