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AAA battery

AAA batteries showing both alkaline (LR03) and zinc (R03) versions
D, C, AA, AAA, AAAA, 9-Volt batteries

The AAA battery (or triple-A battery) is a standard size of dry cell 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 IEC as R03, by ANSI C18.1 as 24, by old 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 The American Ever Ready Company in 1911.[1] They're called #7 batteries in China, the name originating from the Burgess Battery Company designating his AAA batteries "Number 7".[citation needed]

An AAA battery is a single cell that measures 10.5 mm (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).[2] Alkaline AAA batteries weigh around 11.5 grams (0.41 oz), while primary lithium AAA batteries weigh about 7.6 g (0.27 oz). Rechargeable nickel–metal hydride (NiMH) AAA batteries typically weigh 14–15 g (0.49–0.53 oz).


AAA batteries are most often used in small electronic devices, such as TV remote controls, MP3 players 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 (rechargeable) 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 12 AAA 10.4mm 22.7mm GP35AAAH 1.2 ~350–1,000[7] 0.42 - 1.2 Yes
Li-ion 13 AAA 10180 3.7 ~100 0.4 Yes
Li-ion 23 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 1.2 V NiMH rechargeable batteries in AA and AAA

See also


  1. ^ About Eveready
  2. ^ "ENERGIZER E92 PRODUCT DATASHEET" (PDF). Archived from the original (PDF) on 23 January 2013. Retrieved 9 January 2014.
  3. ^ Life Cycle Impacts of Alkaline Batteries with a Focus on End-of-Life - EPBA-EU.
  4. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2012-03-25. Retrieved 2015-02-23.((cite web)): CS1 maint: archived copy as title (link) INOBAT 2008 statistics.
  5. ^ Monthly battery sales statistics - MoETI - March 2011 Archived 2010-12-06 at the Wayback Machine.
  6. ^ VARTA V4903 datasheet.
  7. ^ "World batteries" (PDF). Archived from the original (PDF) on 2021-01-10. Retrieved 2020-08-19.
  8. ^ "Your guide to types of household batteries". Retrieved 16 February 2018.
  9. ^ "Panasonic vai implantar linha de produção de pilhas palito em S. José". 5 February 2017.
  10. ^ "Pilhas recarregáveis dão vida a equipamentos eletrônicos - Imagem - Guia de Produtos - UOL Tecnologia".
  11. ^ Heinz Albert Keighne, Battery technology handbook, CRC Press, 2003 ISBN 0-8247-4249-4, page 374.
  12. ^ Defence Standards: 61 Series - Electrical Wire and Power.
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AAA battery
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