AA battery
A standard size of dry cell battery
An AA battery is a standard size of single cell cylindrical dry battery. The IEC 60086 system calls it size "R6", and it is known as "double-A" in the United States. AA batteries are commonly used in portable electronic devices.
History
The AA battery was introduced in 1907 and has since become one of the most popular battery sizes. It was standardized by the American National Standards Institute (ANSI) in 1947, and the International Electrotechnical Commission (IEC) later adopted the standard.
Specifications
AA batteries have a cylindrical shape with a length of 49.2–50.5 mm and a diameter of 13.5–14.5 mm. They are available in different chemistries, including alkaline, lithium, nickel-metal hydride (NiMH), and nickel-cadmium (NiCd).
Voltage
The nominal voltage of an AA battery depends on its chemistry:
- Alkaline and zinc-carbon: 1.5 volts
- Lithium: 1.5 volts
- NiMH and NiCd: 1.2 volts
Capacity
The capacity of an AA battery is measured in milliampere-hours (mAh). Alkaline AA batteries typically have a capacity of 1700–3000 mAh, while NiMH rechargeable batteries can have capacities ranging from 600 to 2850 mAh.
Applications
AA batteries are used in a wide variety of devices, including:
Rechargeable AA batteries
Rechargeable AA batteries, such as those using NiMH technology, are popular due to their ability to be recharged hundreds of times. They are environmentally friendly and cost-effective over time compared to disposable batteries.
Gallery
AA battery compared to a matchstick
Six most common battery types, including AA
Eneloop rechargeable AA batteries
Related pages
AA_battery
AA battery next to a matchstick for size comparison
Six most common battery types including AA
Eneloop AA rechargeable battery
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