Aa Battery

Information about Aa Battery

Rechargable AA batteries

An AA battery (IPA pronunciation: [eɪ eɪ] or [ˈdʌbl̩ eɪ]) is a dry cell-type battery commonly used in portable electronic devices. An AA battery measures 51mm in length (50.1mm without the button terminal), 13.5–14.5mm in diameter,^[1] and generally weighs (depending upon materials) approximately 23g (1.97×0.56 inches and 0.81 ounces).

The AA battery type is also classified as LR6 (alkaline) or R6 (carbon-zinc).

As an AA battery is composed of a single chamber, it is more correctly referred to as a cell. Technically, a battery is a collection of cells working together, such as in a car battery. The more common term "battery" will be used throughout the rest of this article.

The nominal output voltage of single-use AA batteries is 1.5 volts, while NiCd (Nickel Cadmium) rechargeable batteries have a nominal voltage of 1.2 V. Specialty batteries based on more unusual chemistries can run at a voltage as high as 1.6 V under load.^[2] The voltage of an AA battery is the same as an AAA battery, C cell or D cell. AA batteries, however, provide power for a longer period than AAA batteries, because their larger size allows them to store a greater mass of anode material which is consumed as it does electrical work. C and D cells, being larger still, last longer still; as a rough guide, the capacity of a battery scales linearly with its mass.

Primary (non-rechargeable) zinc-carbon AA batteries of 400–900 milli amp-hours capacity are common. Zinc-chloride batteries of 1000 to 1500 mAh are often sold as "long life" or "heavy duty". Alkaline batteries from 1700 mAh to almost 3000 mAh cost a little more, but last proportionally longer.

Single-use lithium batteries are also available for high demand devices such as digital cameras, where their high cost is offset by longer running time between battery changes. As of 2007, the only 1.5 V lithium AA is manufactured by Energizer, although AA sized batteries with different nominal voltages are available from others. These should only be used in devices rated for the higher voltage.

Rechargeable AA Batteries

The capacity of rechargeable AA batteries varies with the technology used. Nickel-cadmium (NiCd or NiCad) AAs with a capacity of 650 to 800 mAh are commonly available, while 800 to 1000 mAh AA types are rarer and more expensive. Nickel metal hydride (NiMH) AAs are also available in various capacities ranging from 1400 to 2900 mAh.

The older NiCd battery chemistry can supply a higher current than typical NiMHs, so NiCds are commonly used to power model cars or other relatively high-current-draw devices. New NiMH AAs designed for high current applications are beginning to become available. These use different construction and have lower capacity (1400–1600 mAh) than the highest capacity NiMH batteries.

The newest generation of NiMH AAs (Eneloop) does have a very low self discharging rate and are sold therefore precharged and ready for use.

Recently, AA-sized batteries have been introduced in rechargeable Li-ion chemistry. These batteries also do not supply voltage in the 1.2–1.5 V range and are thus not true AAs.

A lot of rechargeable AA batteries that are sold under various brands are actually made by Sanyo and have just been packaged with that brand's cell-cover. The batteries made by Sanyo have a 'HR' embossed on the bottom of the batteries and are made in Japan or China. The 'HR' characters are commonly found in 2500mAh NiMH rechargeable batteries. Examples include Sanyo, Sony, Uniross (certain regions) and Energizer 2500mAh cells. Despite having the same 'HR' characters they do not perform similarly. [1] In addition to that, the self-discharge rate of 2500mAh NiMHs are relatively high compared to cells of different capacities. [2] [3]

The insides of a ZnC battery

The common zinc-carbon or zinc-chloride AA battery consists of a graphite or plastic rod in the center, paper, electrolytes, a zinc outer shell, and a plastic cover. There is also a pressure valve at the bottom to prevent explosions. However, the pressure valves generally will not prevent leakage or catastrophic failure of the shell if the battery is exposed to fire or extreme heat.

If a Zn-C or Zn-Cl battery is discharged too far then corrosion of the cathode, which is the zinc shell, can occur. If this becomes corroded enough, a breach in the shell can allow electrolyte to leak out. This is a common cause of damage to battery-powered appliances which are left unattended for long periods with batteries inside. The electrolyte can also cause minor skin damage, and should be kept away from eyes, and not ingested.

References

1. ^ [4] shows a copy of the page from the primary reference, IEC60086-2. Someone with access to the primary reference can replace this ref.
2. ^ Datasheet for Duracell AA Power Pix

battery is a device consisting of one or more electrochemical cells, which store chemical energy and make it available in an electrical form. There are many types of electrochemical cells, including galvanic cells, electrolytic cells, fuel cells, flow cells, and voltaic cells.
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Electronics is the study of the flow of charge through various materials and devices such as, semiconductors, resistors, inductors, capacitors, nano-structures, and vacuum tubes. All applications of electronics involve the transmission of power and possibly information.
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1 metre =
SI units
1000 mm 0 cm
US customary / Imperial units
0 ft 0 in

The metre or meter^[1](symbol: m) is the fundamental unit of length in the International System of Units (SI).
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Gram
Unit sign g
Measure Mass
Base Unit Kilogram
Multiple of Base 10⁻³
System SI, CGS, other
Common usage Commonly used in cooking and food labeling
Examples
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The adjective nominal (ultimately from Latin nōmen, "name") generally relates to the concept of names, and often to the difference between what something is in name (ideally or theoretically) and what it is in reality.

A nominal quantity (e.g.
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Voltage (sometimes also called electric potential difference or electrical tension) is the potential similarity of electrical potential between two points of an electrical or electronic circuit, expressed in volts.
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rechargeable battery, also known as a storage battery, is a group of two or more secondary cells. These batteries can be restored to full charge by the application of electrical energy.
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AAA battery (pronounced "triple A") is 44.5 mm long and 10.5 mm in diameter, weighing around 11.5 grams. Output of alkaline batteries in this size is 1.5 volts, 900 to 1,155 mA·h (3240 to 4158 coulombs).
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C cell can refer to:

a type of battery (electricity)
another name for a parafollicular cell

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D cell can mean:

D battery, a common size of battery (article link redirects to Battery (electricity))
D cell (biology), a hormone secreting, regulatory cell type found in the stomach

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A Zinc-carbon dry cell or battery is packaged in a zinc can that serves as both a container and anode. It was developed from the wet Leclanché cell (IPA pronunciation: [lɛklɑːnˈʃei]).
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Milli redirects here. See Millie for similar-sounding words

Milli- (symbol m) is a prefix in the SI and other systems of units denoting a factor of 10⁻³, or 1/1,000.
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An ampere-hour (abbreviated as Ah or A-h) is a unit of electric charge. One ampere-hour is equal to 3600 coulombs (ampere-seconds), and is the amount of electric charge transferred by a steady current of one ampere for one hour.
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Alkaline batteries are a type of power cell dependent upon the reaction between zinc and manganese dioxide (Zn/MnO₂).

Compared with original
zinc-carbon batteries, while both produce approximately 1.
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Lithium batteries are primary batteries that have lithium metal or lithium compounds as an anode. Depending on the design and chemical compounds used lithium cells can produce voltages from 1.5V to about 3V, twice the voltage of an ordinary zinc-carbon battery or alkaline cell.
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digital camera is an electronic device used to capture and store photographs digitally, instead of using photographic film like conventional cameras, or recording images in an analog format to magnetic tape like many video cameras.
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nickel-cadmium battery (commonly abbreviated NiCd and pronounced "nye-cad") is a popular type of rechargeable battery using nickel(IV) oxide and metallic cadmium as electrodes.
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nickel-metal hydride battery, abbreviated NiMH, is a type of rechargeable battery similar to a nickel-cadmium (NiCd) battery but has a hydrogen-absorbing alloy for the anode instead of cadmium. As in NiCd batteries, nickel is the cathode.
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Electric current is the flow (movement) of electric charge. The SI unit of electric current is the ampere (A), which is equal to a flow of one coulomb of charge per second.

Definition

The amount of electric current (measured in amperes) through some surface, e.g.
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A low self discharge nickel metal hydride battery made by Sanyo, available in AA (2000 mAh) and AAA (800 mAh) sizes. They are sold pre-charged and due to the low self-discharge, can usually be used immediately after purchase.
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2.8-5 Wh/US$^[2]
Self-discharge rate 5%-10%/month
Time durability (24-36) months
Cycle durability 1200 cycles
Nominal Cell Voltage 3.6 / 3.7 V
Charge temperature interval

Lithium-ion batteries (sometimes abbreviated Li-ion batteries
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Graphite (named by Abraham Gottlob Werner in 1789 from the Greek γραφειν (graphein): "to draw/write", for its use in pencils) is one of the allotropes of carbon.
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Zinc (IPA: /ˈzɪŋk/, from German: Zink) is a chemical element in the periodic table that has the symbol Zn and atomic number 30.
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In electronics, an A battery is any battery used to provide power to the filament of a vacuum tube. It is sometimes colloquially referred to as a "wet battery" (although there's no reason why a "dry" battery of suitable voltage couldn't be utilised for the purpose; the A battery in
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both the batteries' size and chemistry, while older names do not. For a more complete list see battery types. This summary is only for types relating to battery "sizes".

Battery chemistry primary

(charge density order)

Chemistry Cell
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