POWER BANK · ICAO/IATA 2026
Power bank mAh to Wh calculator - can I take it on a plane? 2026
Convert power-bank mAh and voltage to Wh and check the 100 Wh aviation limit. ICAO/IATA 2026: maximum two power banks, cabin baggage only.
mAh to Wh calculator
20000 mAh × 3.7 V ÷ 1000 = 74.0 Wh
Up to 100 Wh - within the current IATA power-bank limit for carry-on baggage.
Up to 100 Wh - within the current IATA power-bank limit for carry-on baggage.
Formula: Wh = mAh × V ÷ 1000.
100 Wh
From 27 March 2026, ICAO limits passengers to two power banks and prohibits recharging a power bank from aircraft power. Power banks must not be placed in checked baggage.
Examples
10 000 mAh × 3.7 V
37 Wh
20 000 mAh × 3.7 V
74 Wh
Official source
ICAO - New power bank restrictions 2026 ↗
IATA - Guidance to operators: Power Banks 2026 ↗