Battery mAh to Wh Calculator
Convert a battery’s mAh rating to watt-hours, check whether a power bank is allowed on a plane, and estimate how many phone charges it holds.
Result
Charge count assumes about 65% of the rated capacity reaches the phone after voltage conversion and heat losses. Airline rules are the FAA and IATA limits; check your airline.
Energy
74Wh
- Flying with it
- Allowed in carry-on bags on most airlines (100 Wh or less).
- Full phone charges, about
- 3.3