# AAA battery

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Standard size of dry cell battery

For anti-aircraft artillery batteries, see [anti-aircraft warfare](/source/Anti-aircraft_warfare).

"Micro cell" redirects here. For the chemical compound, see [Calcium silicate](/source/Calcium_silicate).

AAA batteries showing both alkaline (LR03) and zinc (R03) versions

[D](/source/D_battery), [C](/source/C_battery), [AA](/source/AA_battery), **AAA**, [AAAA](/source/AAAA_battery), 9-Volt batteries

The **AAA battery** (or **triple-A battery**) is a [standard size](/source/List_of_battery_sizes) of [dry cell](/source/Dry_cell) [battery](/source/Battery_(electricity)). They are commonly used in portable electronic devices, typically low-drain ones. AAA batteries are single cell and are made in both [primary](/source/Primary_battery) (disposable) and [secondary](/source/Secondary_batteries) (rechargable) types.

An AAA battery is smaller than an [AA battery](/source/AA_battery). It measures 10.5 [mm](/source/Millimetre) (0.41 in) in diameter and 44.5 mm (1.75 in) in length, including the positive terminal button, which is a minimum 0.8 mm (0.031 in). The positive terminal has a maximum diameter of 3.8 mm (0.15 in); the flat negative terminal has a minimum diameter of 4.3 mm (0.17 in).[1] [Alkaline](/source/Alkaline_battery) AAA batteries weigh around 11.5 [grams](/source/Gram) (0.41 oz), while primary [lithium](/source/Lithium_battery) AAA batteries weigh about 7.6 g (0.27 oz). Rechargeable [nickel–metal hydride](/source/Nickel%E2%80%93metal_hydride_battery) (NiMH) AAA batteries typically weigh 14–15 g (0.49–0.53 oz).

## Designations

A [zinc–carbon battery](/source/Zinc%E2%80%93carbon_battery) in this size is designated by [IEC](/source/International_Electrotechnical_Commission) as **R03**, by [ANSI](/source/ANSI) C18.1 as **24**, by old [JIS](/source/Japanese_Industrial_Standards) 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 [The American Ever Ready Company](/source/Eveready_Battery_Company) in 1911.[2] In [Mainland China](/source/China), they are called #7 batteries, the name originating from Charles F. Burgess of the [Burgess Battery Company](/source/Burgess_Battery_Company) designating his AAA batteries "Number 7".[*[citation needed](https://en.wikipedia.org/wiki/Wikipedia:Citation_needed)*]

## Use

AAA batteries are most often used in small electronic devices, such as [TV](/source/Television) remote controls, [MP3 players](/source/MP3_player) 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](/source/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 (rechargeable)](/source/Secondary_battery) sales.[3][4][5]

Chemistry IEC name ANSI/NEDA name Nominal voltage (V) Typical capacity (mAh) Typical capacity (Wh) Rechargeable Zinc–carbon R03 24D 1.5 540 0.81 No Alkaline LR03 24A 1.5 860–1,200[6] 1.3–1.8 Some Li-FeS2 FR03 24LF 1.5 1,200 1.8 No NiMH 1⁄2 AAA 10.4mm 22.7mm GP35AAAH 1.2 ~350–1,000[7] 0.42 - 1.2 Yes Li-ion 1⁄3 AAA 10180 3.7 ~100 0.4 Yes Li-ion 2⁄3 AAA 10280 3.7 ~200 0.8 Yes Li-ion AAA 10440 3.7 ~350 1.3 Yes NiCd KR03 24K 1.25 300–500 0.38–0.63 Yes NiMH HR03 24H 1.25 600–1,250[8] 0.75–1.6 Yes

## Other common names

Panasonic [Eneloop](/source/Eneloop) 1.2 V [NiMH](/source/Nickel%E2%80%93metal_hydride_battery) [rechargeable batteries](/source/Rechargeable_batteries) in AA and AAA

- U16 (In [Britain](/source/United_Kingdom) until the 1980s)

- Micro ([Germany](/source/Germany))

- Ministilo ([Italy](/source/Italy))

- MN2400

- MX2400

- Type 286 ([Soviet Union](/source/Soviet_Union)/Russia)

- Palito (Brazil)[9][10]

- Pencil cell (India, Turkey)

- UM 4 ([JIS](/source/Japanese_Industrial_Standards))[11]

- #7 ([Mainland China](/source/China))

- #4 ([Taiwan](/source/Taiwan))

- 6135-99-117-3143 (NSN)[12]

## See also

- [List of battery sizes](/source/List_of_battery_sizes)

- [Battery nomenclature](/source/Battery_nomenclature)

- [Battery recycling](/source/Battery_recycling)

- [Battery holder](/source/Battery_holder)

## References

1. **[^](#cite_ref-1)** ["ENERGIZER E92 PRODUCT DATASHEET"](https://web.archive.org/web/20130123141321/http://data.energizer.com/PDFs/E92.pdf) (PDF). Archived from [the original](http://data.energizer.com/PDFs/E92.pdf) (PDF) on 23 January 2013. Retrieved 9 January 2014.

1. **[^](#cite_ref-2)** [About Eveready](https://www.eveready.com/about-us/about-eveready)

1. **[^](#cite_ref-3)** [Life Cycle Impacts of Alkaline Batteries with a Focus on End-of-Life - EPBA-EU](https://web.archive.org/web/20160303173602/http://www.epbaeurope.net/documents/NEMA_alkalinelca2011.pdf).

1. **[^](#cite_ref-4)** ["Archived copy"](https://web.archive.org/web/20120325171702/http://www.inobat.ch/fileadmin/user_upload/pdf_09/Absatz_Statistik_2008.pdf) (PDF). Archived from [the original](http://www.inobat.ch/fileadmin/user_upload/pdf_09/Absatz_Statistik_2008.pdf) (PDF) on 2012-03-25. Retrieved 2015-02-23.{{[cite web](https://en.wikipedia.org/wiki/Template:Cite_web)}}: CS1 maint: archived copy as title ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_archived_copy_as_title)) INOBAT 2008 statistics.

1. **[^](#cite_ref-5)** [Monthly battery sales statistics - MoETI - March 2011](http://www.baj.or.jp/e/statistics/02.php) [Archived](https://web.archive.org/web/20101206075143/http://www.baj.or.jp/e/statistics/02.php) 2010-12-06 at the [Wayback Machine](/source/Wayback_Machine).

1. **[^](#cite_ref-6)** [VARTA V4903 datasheet](http://www.farnell.com/datasheets/39630.pdf).

1. **[^](#cite_ref-7)** ["World batteries"](https://web.archive.org/web/20210110005203/http://worldbatteries.net/PDFs/2025115019spec.pdf) (PDF). Archived from [the original](http://worldbatteries.net/PDFs/2025115019spec.pdf) (PDF) on 2021-01-10. Retrieved 2020-08-19.

1. **[^](#cite_ref-Battery_Guide_8-0)** ["Your guide to types of household batteries"](https://michaelbluejay.com/batteries/). michaelbluejay.com. Retrieved 16 February 2018.

1. **[^](#cite_ref-9)** ["Panasonic vai implantar linha de produção de pilhas palito em S. José"](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). 5 February 2017.

1. **[^](#cite_ref-10)** ["Pilhas recarregáveis dão vida a equipamentos eletrônicos - Imagem - Guia de Produtos - UOL Tecnologia"](https://tecnologia.uol.com.br/guia-produtos/imagem/ult6186u1.jhtm).

1. **[^](#cite_ref-11)** Heinz Albert Keighne, *Battery technology handbook*, CRC Press, 2003 [ISBN](/source/ISBN_(identifier)) [0-8247-4249-4](https://en.wikipedia.org/wiki/Special:BookSources/0-8247-4249-4), page 374.

1. **[^](#cite_ref-DSTAN_12-0)** [Defence Standards: 61 Series - Electrical Wire and Power](https://web.archive.org/web/20110805131728/https://www.dstan.mod.uk/61e.php).

## External links

Wikimedia Commons has media related to [AAA batteries](https://commons.wikimedia.org/wiki/Category:AAA_batteries).

- [Specifications for Energizer alkaline AAA battery (E92)](https://data.energizer.com/pdfs/E92_Max_NA-NOV.pdf)

- [Specifications for Energizer lithium AAA battery (L92)](https://data.energizer.com/pdfs/l92.pdf)

- [Brand Neutral Drawing Of Alkaline AAA Battery based on ANSI specifications](http://www.batteryholders.org/aaa.pdf)

- [Brand Neutral Drawing Of NICAD AAA Battery based on ANSI Specifications](http://www.batteryholders.org/AAA-NiCd.pdf) [Archived](https://web.archive.org/web/20210107103517/http://www.batteryholders.org/AAA-NiCd.pdf) 2021-01-07 at the [Wayback Machine](/source/Wayback_Machine)

- [Brand Neutral Drawing Of NiMH AAA Battery based on ANSI Specifications](http://www.batteryholders.org/AAA-NiMH.pdf) [Archived](https://web.archive.org/web/20210108153752/http://www.batteryholders.org/AAA-NiMH.pdf) 2021-01-08 at the [Wayback Machine](/source/Wayback_Machine)

- [Brand Neutral Drawing Of Rechargeable AAA Battery based on ANSI Specifications](http://www.batteryholders.org/AAA-RECHARGE.pdf) [Archived](https://web.archive.org/web/20210108155714/http://www.batteryholders.org/AAA-RECHARGE.pdf) 2021-01-08 at the [Wayback Machine](/source/Wayback_Machine)

v t e Battery sizes Single-cell AAAA AAA AA C D N Button cell 18650 Multiple-cell Nine-volt (PP3) Lantern A23 A27 CR-V3

[Portals](https://en.wikipedia.org/wiki/Wikipedia:Contents/Portals):
- [Energy](https://en.wikipedia.org/wiki/Portal:Energy)
- [Electronics](https://en.wikipedia.org/wiki/Portal:Electronics)

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Adapted from the Wikipedia article [AAA battery](https://en.wikipedia.org/wiki/AAA_battery) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/AAA_battery?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.