Ampereuren

Ampereuren is the Dutch term for ampère-uren, a unit of electric charge representing the amount of charge transferred by a constant current of one ampere for one hour. The singular form is ampère-uur; the plural is ampère-uren, though in some texts the concatenated form ampereuren may appear. In English the unit is known as ampere-hour (Ah).

One ampere-hour equals one ampere times one hour, which is 3600 ampere-seconds, i.e., 3600 coulombs. The ampere-hour is a non-SI unit commonly used to quantify battery capacity and energy storage in devices ranging from small electronics to electric vehicles.

Battery capacity ratings specify how much charge a battery can deliver, informing estimated runtime under given discharge rates. For example, a 2 Ah battery can supply 2 amperes for one hour, or 1 ampere for two hours, neglecting losses.

Capacity may depend on discharge rate, temperature, and age; Peukert's law describes how effective capacity changes under higher currents for some chemistries. The ampere-hour measures charge, not energy; energy depends on voltage (e.g., Wh = Ah × V).

Related concepts include the coulomb, the ampere, battery capacity, and energy density.