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SESK: Stuff Everyone Should Know · sesk.info/trav-battery-watt-hour-math

A 12-volt battery rated at 8 amp hours has how many watt hours?

96 Wh, from 12 volts times 8 amp hours.

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  1. 96 Wh ✔
  2. 20 Wh
  3. 150 Wh

Why: Multiply volts by amp hours to get watt hours. For milliamp hours, divide by 1000 first.

Huh, didn't know that: 96 Wh is under the 100 Wh limit, so no airline approval is needed.

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References

Answer: 96 Wh. Multiply volts by amp hours to get watt hours. For milliamp hours, divide by 1000 first.

  1. FAA: Airline passengers and batteries www.faa.gov/hazmat/packsafe/airline-passengers-and-batteries
    To determine Wh, multiply the volts (V) by the amp hours (Ah).
    Checked 2026-10-11.

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