View source for AAA battery

{{Short description|Standard size of dry cell battery}}
{{For|anti-aircraft artillery batteries|anti-aircraft warfare}}
{{redir|Micro cell|the chemical compound|Calcium silicate}}
[[Image:Kodak AAA alkaline and zinc carbon batteries.jpg|thumb|AAA batteries showing both alkaline (LR03) and zinc (R03) versions]]
[[File:6 most common battery types-1.jpg|thumb|right|[[D battery|D]], [[C battery|C]], [[AA battery|AA]], '''AAA''', [[AAAA battery|AAAA]], 9-Volt batteries]]

The '''AAA battery''' (or '''triple-A battery''') is a [[List of battery sizes|standard size]] of [[dry cell]] [[Battery (electricity)|battery]]. One or more AAA batteries are commonly used in low-drain portable electronic devices. A [[zinc–carbon battery]] in this size is designated by [[International Electrotechnical Commission|IEC]] as '''R03''', by [[ANSI]] C18.1 as '''24''', by old [[Japanese Industrial Standards|JIS]] standard as '''UM-4''', and by other manufacturer and national standard designations that vary depending on the cell chemistry. The size was first introduced by [[Eveready Battery Company|The American Ever Ready Company]] in 1911.<ref>[https://www.eveready.com/about-us/about-eveready About Eveready]</ref> In [[China|Mainland China]], they are called #7 batteries, the name originating from Charles F. Burgess of the [[Burgess Battery Company]] designating his AAA batteries "Number 7".{{cn|date=September 2023}}

An AAA battery is a single cell that measures {{Convert|10.5|mm||lk=in|abbr=on}} in diameter and {{Convert|44.5|mm||abbr=on}} in length, including the positive terminal button, which is a minimum {{Convert|0.8|mm||abbr=on}}. The positive terminal has a maximum diameter of {{Convert|3.8|mm||abbr=on}}; the flat negative terminal has a minimum diameter of {{Convert|4.3|mm||abbr=on}}.<ref>{{cite web|title=ENERGIZER E92 PRODUCT DATASHEET|url=http://data.energizer.com/PDFs/E92.pdf|access-date=9 January 2014|archive-date=23 January 2013|archive-url=https://web.archive.org/web/20130123141321/http://data.energizer.com/PDFs/E92.pdf|url-status=dead}}</ref>  [[Alkaline battery|Alkaline]] AAA batteries weigh around {{Convert|11.5|g||lk=in}}, while primary [[lithium battery|lithium]] AAA batteries weigh about {{Convert|7.6|g||abbr=on}}. Rechargeable [[Nickel–metal hydride battery|nickel–metal hydride]] (NiMH) AAA batteries typically weigh {{Convert|14-15|g||abbr=on}}.

==Use==
AAA batteries are most often used in small electronic devices, such as [[Television|TV]] remote controls, [[MP3 player]]s and digital cameras. Devices that require the same voltage, but have a higher current draw, are often designed to use larger batteries such as the [[AA battery]] type.  AA batteries have about three times the capacity of AAA batteries. With the increasing efficiency and miniaturization of modern electronics, many devices that previously were designed for AA batteries (remote controls, cordless computer mice and keyboards, etc.) are being replaced by models that accept AAA battery cells.

As of 2007, AAA batteries accounted for 24% of alkaline primary battery sales in the United States. In Japan as of 2011, 28% of alkaline primary batteries sold were AAA. In Switzerland as of 2007, AAA batteries totaled 30% of primary battery sales and 32% of [[secondary battery| secondary battery (rechargeable)]] sales.<ref>[https://web.archive.org/web/20160303173602/http://www.epbaeurope.net/documents/NEMA_alkalinelca2011.pdf Life Cycle Impacts of Alkaline Batteries with a Focus on End-of-Life - EPBA-EU].</ref><ref>{{cite web|url=http://www.inobat.ch/fileadmin/user_upload/pdf_09/Absatz_Statistik_2008.pdf |title=Archived copy |access-date=2015-02-23 |url-status=dead |archive-url=https://web.archive.org/web/20120325171702/http://www.inobat.ch/fileadmin/user_upload/pdf_09/Absatz_Statistik_2008.pdf |archive-date=2012-03-25 }} INOBAT 2008 statistics.</ref><ref>[http://www.baj.or.jp/e/statistics/02.php Monthly battery sales statistics - MoETI - March 2011] {{Webarchive|url=https://web.archive.org/web/20101206075143/http://www.baj.or.jp/e/statistics/02.php |date=2010-12-06 }}.</ref>

{{table alignment}}
{| class="wikitable sortable col4center col5center col6center"
|-
! [[Comparison of commercial battery types|Chemistry]] 
! class="unsortable"|IEC name 
! class="unsortable"|ANSI/NEDA name 
! data-sort-type=numeric | Nominal [[voltage]] (V) 
! data-sort-type=numeric | Typical capacity ([[mAh]]) 
! data-sort-type=numeric | Typical capacity ([[Kilowatt hour|Wh]])
! Rechargeable
|-
| [[Zinc–carbon battery|Zinc–carbon]] 
| R03 
| 24D 
| 1.5
| 540
| 0.81
| {{No}}
|-
| [[Alkaline battery|Alkaline]] 
| LR03 
| 24A 
| 1.5
| {{sort|1030|860–1,200}}<ref>[http://www.farnell.com/datasheets/39630.pdf VARTA V4903 datasheet].</ref> 
| {{sort|1.55|1.3–1.8}}
| {{Some|[[Rechargeable alkaline battery|Some]]}}
|-
| [[Lithium battery|Li-FeS<sub>2</sub>]] 
| FR03 
| 24LF 
| 1.5
| {{sort|1200|1,200}} 
| 1.8
| {{No}}
|- 
| [[Nickel–metal hydride battery|NiMH]] 
| {{frac|1|2}} AAA 10.4mm 22.7mm  
| GP35AAAH
| 1.2
| ~350–1,000<ref>{{cite web|url=http://worldbatteries.net/PDFs/2025115019spec.pdf|title=World batteries|access-date=2020-08-19|archive-date=2021-01-10|archive-url=https://web.archive.org/web/20210110005203/http://worldbatteries.net/PDFs/2025115019spec.pdf|url-status=dead}}</ref> 
| 0.42 - 1.2
| {{Yes}}
|-
| [[Lithium-ion battery|Li-ion]]
| {{frac|1|3}} AAA
| 10180
| 3.7
| ~100
| 0.4
| {{Yes}}
|-
| [[Lithium-ion battery|Li-ion]] 
| {{frac|2|3}} AAA
| 10280
| 3.7
| ~200
| 0.8
| {{Yes}}
|-
| [[Lithium-ion battery|Li-ion]] 
| AAA
| 10440
| 3.7
| ~350
| 1.3
| {{Yes}}
|-
| [[Nickel–cadmium battery|NiCd]] 
| KR03 
| 24K
| 1.25
| {{sort|450|300–500}} 
| {{sort|0.51|0.38–0.63}}
| {{Yes}}
|-
| [[Nickel–metal hydride battery|NiMH]] 
| HR03 
| 24H
| 1.25
| {{sort|925|600–1,250}}<ref name="Battery Guide">{{cite web |title=Your guide to types of household batteries |url=https://michaelbluejay.com/batteries/|publisher=michaelbluejay.com |access-date=16 February 2018}}</ref> 
| {{sort|1.175|0.75–1.6}}
| {{Yes}}
|}

==Other common names==
[[File:Eneloop 6420.jpg|thumb|right|Panasonic [[Eneloop]] 1.2&nbsp;V [[Nickel–metal hydride battery|NiMH]] [[rechargeable batteries]] in AA and AAA]]
* U16 (In [[United_Kingdom|Britain]] until the 1980s)
* Micro ([[Germany]])
* Ministilo ([[Italy]])
* MN2400
* MX2400
* Type 286 ([[Soviet Union]]/Russia)
* Palito (Brazil)<ref>{{cite web | url=http://g1.globo.com/sp/vale-do-paraiba-regiao/noticia/2017/02/panasonic-vai-implantar-linha-de-producao-de-pilhas-palito-em-sao-jose.html | title=Panasonic vai implantar linha de produção de pilhas palito em S. José | date=5 February 2017 }}</ref><ref>{{cite web | url=https://tecnologia.uol.com.br/guia-produtos/imagem/ult6186u1.jhtm | title=Pilhas recarregáveis dão vida a equipamentos eletrônicos - Imagem - Guia de Produtos - UOL Tecnologia }}</ref>
* Pencil cell (India, Turkey)
* UM 4 ([[Japanese Industrial Standards|JIS]])<ref>Heinz Albert Keighne, ''Battery technology handbook'', CRC Press, 2003 {{ISBN|0-8247-4249-4}}, page 374.</ref>
* #7 ([[China|Mainland China]])
* #4 ([[Taiwan]])
* 6135-99-117-3143 (NSN)<ref name="DSTAN">[https://web.archive.org/web/20110805131728/https://www.dstan.mod.uk/61e.php Defence  Standards: 61 Series - Electrical Wire and Power].</ref>

==See also==
* [[List of battery sizes]]
* [[Battery nomenclature]]
* [[Battery recycling]]
* [[Battery holder]]

==References==
{{reflist|2}}

==External links==
{{Commons category}}
* [https://data.energizer.com/pdfs/E92_Max_NA-NOV.pdf Specifications for Energizer alkaline AAA battery (E92)]
* [https://data.energizer.com/pdfs/l92.pdf Specifications for Energizer lithium AAA battery (L92)]
*[http://www.batteryholders.org/aaa.pdf  Brand Neutral Drawing Of Alkaline AAA Battery based on ANSI specifications]
*[http://www.batteryholders.org/AAA-NiCd.pdf  Brand Neutral Drawing Of NICAD AAA Battery based on ANSI Specifications ] {{Webarchive|url=https://web.archive.org/web/20210107103517/http://www.batteryholders.org/AAA-NiCd.pdf |date=2021-01-07 }}
*[http://www.batteryholders.org/AAA-NiMH.pdf  Brand Neutral Drawing Of NiMH AAA Battery based on ANSI Specifications] {{Webarchive|url=https://web.archive.org/web/20210108153752/http://www.batteryholders.org/AAA-NiMH.pdf |date=2021-01-08 }}
*[http://www.batteryholders.org/AAA-RECHARGE.pdf  Brand Neutral Drawing Of Rechargeable AAA Battery based on ANSI Specifications] {{Webarchive|url=https://web.archive.org/web/20210108155714/http://www.batteryholders.org/AAA-RECHARGE.pdf |date=2021-01-08 }}

{{Battery sizes}}
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[[Category:Battery shapes]]