AAA battery

<p>The AAA battery (or triple-A battery) is a <a href="/facts/List_of_battery_sizes/67MGwWxX">standard size</a> of <a href="/facts/Dry_cell/3Iwh09rG">dry cell</a> <a href="/facts/Battery_(electricity)/bqEpm4ue">battery</a>. One or more AAA batteries are commonly used in low-drain portable electronic devices. A <a href="/facts/Zinc%E2%80%93carbon_battery/MDC00Uuh">zinc–carbon battery</a> in this size is designated by <a href="/facts/International_Electrotechnical_Commission/hSK0kjwI">IEC</a> as R03, by <a href="/facts/ANSI/p3d1TQCb">ANSI</a> C18.1 as 24, by old <a href="/facts/Japanese_Industrial_Standards/qLrjj90V">JIS</a> 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 <a href="/facts/Eveready_Battery_Company/Whzv0wWA">The American Ever Ready Company</a> in 1911. In China, they are called #7 batteries, the name originating from the Burgess Battery Company designating his AAA batteries "Number 7".
</p><p>An AAA battery is a single cell that measures 10.5 <a href="/facts/Millimetre/25mdTXpa">mm</a> (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).  <a href="/facts/Alkaline_battery/gL5XUWo4">Alkaline</a> AAA batteries weigh around 11.5 <a href="/facts/Gram/sRSW5RJb">grams</a> (0.41 oz), while primary <a href="/facts/Lithium_battery/D5yfo8XS">lithium</a> AAA batteries weigh about 7.6 g (0.27 oz). Rechargeable <a href="/facts/Nickel%E2%80%93metal_hydride_battery/EvCG8loy">nickel–metal hydride</a> (NiMH) AAA batteries typically weigh 14–15 g (0.49–0.53 oz).
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AAA battery open-in-new

AAA battery