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  1. AAAA battery
  2. AAA battery
  3. AA battery
  4. A battery
  5. Absorbent glass mat
  6. Alessandro Volta
  7. Alkaline battery
  8. Alkaline fuel cell
  9. Aluminium battery
  10. Ampere
  11. Atomic battery
  12. Backup battery
  13. Baghdad Battery
  14. Batteries
  15. Battery charger
  16. B battery
  17. Bernard S. Baker
  18. Beta-alumina solid electrolyte
  19. Betavoltaics
  20. Bio-nano generator
  21. Blue energy
  22. Bunsen cell
  23. Car battery
  24. C battery
  25. Clark cell
  26. Concentration cell
  27. Coulomb
  28. 2CR5
  29. Daniell cell
  30. Direct borohydride fuel cell
  31. Direct-ethanol fuel cell
  32. Direct methanol fuel cell
  33. Dry cell
  34. Dry pile
  35. Duracell
  36. Duracell Bunny
  37. Earth battery
  38. Electric charge
  39. Electric current
  40. Electricity
  41. Electrochemical cell
  42. Electrochemical potential
  43. Electro-galvanic fuel cell
  44. Electrolysis
  45. Electrolyte
  46. Electrolytic cell
  47. Electromagnetism
  48. Electromotive force
  49. Energizer Bunny
  50. Energy
  51. Energy density
  52. Energy storage
  53. Flashlight
  54. Float charging
  55. Flow Battery
  56. Formic acid fuel cell
  57. Fuel cell
  58. Fuel cell bus trial
  59. Galvanic cell
  60. Gel battery
  61. Grove cell
  62. Half cell
  63. History of the battery
  64. Hybrid vehicle
  65. Lead-acid battery
  66. Leclanché cell
  67. Lemon battery
  68. List of battery sizes
  69. List of battery types
  70. List of fuel cell vehicles
  71. Lithium battery
  72. Lithium ion batteries
  73. Lithium iron phosphate battery
  74. Lithium polymer cell
  75. LR44 battery
  76. Luigi Galvani
  77. Manganese dioxide
  78. Memory effect
  79. Mercury battery
  80. Metal hydride fuel cell
  81. Methane reformer
  82. Methanol reformer
  83. Michael Faraday
  84. Microbial fuel cell
  85. Molten carbonate fuel cell
  86. Molten salt battery
  87. Nickel-cadmium battery
  88. Nickel-iron battery
  89. Nickel metal hydride
  90. Nickel-zinc battery
  91. Open-circuit voltage
  92. Optoelectric nuclear battery
  93. Organic radical battery
  94. Oxyride battery
  95. Panasonic EV Energy Co
  96. Peukert's law
  97. Phosphoric acid fuel cell
  98. Photoelectrochemical cell
  99. Polymer-based battery
  100. Power density
  101. Power management
  102. Power outage
  103. PP3 battery
  104. Primary cell
  105. Prius
  106. Proton exchange membrane
  107. Proton exchange membrane fuel cell
  108. Protonic ceramic fuel cell
  109. Radioisotope piezoelectric generator
  110. Ragone chart
  111. RCR-V3
  112. Rechargeable alkaline battery
  113. Reverse charging
  114. Reversible fuel cell
  115. Searchlight
  116. Secondary cell
  117. Short circuit
  118. Silver-oxide battery
  119. Smart Battery Data
  120. Smart battery system
  121. Sodium-sulfur battery
  122. Solid oxide fuel cell
  123. Super iron battery
  124. Thermionic converter
  125. Trickle charging
  126. Vanadium redox battery
  127. Volt
  128. Voltage
  129. Voltaic pile
  130. Watch battery
  131. Water-activated battery
  132. Weston cell
  133. Wet cell
  134. Zinc-air battery
  135. Zinc-bromine flow battery
  136. Zinc-carbon battery

This article is from:

All text is available under the terms of the GNU Free Documentation License: 

AA battery

From Wikipedia, the free encyclopedia

Rechargable AA batteries
Rechargable AA batteries

A 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 weighs approximately 23g (1.97×0.56 inches and 0.81 ounces).


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 rechargeable batteries have a nominal voltage of 1.2V. The voltage of a AA battery is the same as a 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 more electrolyte. C and D cells, being larger still, can be expected to last longer again.

Primary (non-rechargeable) zinc-carbon AA batteries of 400–900 milliamp-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 AAs 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 1.5V lithium AA is manufactured by Eveready, although AA sized batteries with different nominal voltages are available from others. These should only be used in devices rated for the higher voltage.

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 AAs 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.

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.

In September 2006 the USBCELL was launched with a built-in charger and USB connector within the AA format, enabling the battery to simply be charged by plugging into a USB port without external cables or adaptors.

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.


  1. ^ shows a copy of the page from the primary reference, IEC60086-2. Someone with access to the primary reference can replace this ref.

See also

  • A battery (vacuum tubes)
  • List of battery sizes
  • Battery (electricity)

External links

  • Detailed statistics of an Energizer AA battery
  • Detailed statistics of a Duracell AA battery
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