Ampere-hour

The ampere-hour (symbol: Ah ) is an electric unit of Charge.

The ampere-hour expresses a quantity.

For example a battery of capacity 50Ah, could deliver (if its flow allowed it) 50 amps during one hour, or 25 amps during two hours etc All depends on the consumption of the circuit using the battery.

Let us take another example: A battery (charged) of 12v of capacity 31Ah, is used by a radio station of consumption 12v with 2A. The car radio will be able to thus function 15 hours and 30 minutes before dying out.

X ampere-hour (X Ah) per X amp thus should not be confused per hour (X A/h).

The unit of the international System (IF) is the Coulomb, but the ampere-hour is often employed to indicate the load of the batteries.

One ampere-hour equalizes 3.600 coulombs.

The Rapport of 1990 on orthographical corrections (see § IV.2 '' not '' G) recommends to write ampèreheure by welding the two elements.

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