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AAA battery

"Micro cell" redirects here. For the chemical compound, see Micro-cell.
File:6 most common battery types-1.jpg
D, C, AA, AAA, AAAA, 9-Volt batteries

An AAA or triple-A battery is a standard size of dry cell battery commonly used in low drain portable electronic devices. A carbon-zinc 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.

A triple-A battery is a single cell and measures 44.5 mm in length and 10.5 mm in diameter. The length includes the positive terminal button which is a minimum 0.8mm high and 3.8mm in diameter; the flat negative terminal has a minimum diameter of 4.3 mm.[1] Alkaline AAA batteries weigh around 11.5 grams each, while lithium AAA Batteries weigh about 7.6 g. Rechargeable nickel–metal hydride (NiMH) AAA Batteries typically weigh 14–15 g.


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 which previously were designed for AA batteries (remote controls, and 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 2008, AAA batteries totaled 30% of primary battery sales and 32% of secondary battery sales.[2][3][4]

  Zinc–carbon Alkaline Li-FeS2 NiCd NiMH
IEC name R03 LR03 FR03 KR03 HR03
ANSI/NEDA name 24D 24A 24LF
Typical capacity 540 mAh 860–1,200 mAh[5] 1,200 mAh 300–500 mAh 600–1,250[6] mAh
Nominal voltage 1.50 V 1.50 V 1.50 V 1.25 V 1.25 V
Rechargeable No Some No Yes Yes


Other common names

  • U16 (In Britain until the 1980s)
  • Micro
  • Micro light
  • MN2400
  • MX2400
  • Palito (Brazil)
  • Type 286 (Soviet Union/Russia)
  • UM 4 ( JIS)[8]
  • #7 (China)
  • 6135-99-117-3143 (NSN)[9]
  • AAA battery
  • R3 (Poland)

See also


External links