How intensive the workload they’re placed under is, and for how long at a time they’re kept in active use Widely regarded as the most produced lithium-ion cell size. [206] This cell type is used in many laptop computer batteries, cordless power tools, many electric cars, electric scooters, [207] most e-bikes, older portable powerbanks, electronic cigarettes, [208] [209] portable fans and LED flashlights. Nominal voltage is 3.6-3.7V. [186] Energizer No. 413" (PDF). Datasheet.octopart.com. Archived (PDF) from the original on 14 October 2013 . Retrieved 23 February 2015. Consult your airline for advice regarding any spare rechargeable Li-ion batteries - these are generally allowed as carry-on, but are often subject to strict size limits

Introduced in 1907 by The American Ever Ready Company, [5] [ third-party source needed] the AA battery size was standardized by the American National Standards Institute (ANSI) in 1947, but it had been in use in flashlights and electrical novelties before formal standardization. ANSI and IEC battery nomenclature gives several designations for cells in this size, depending on cell features and chemistry. Before being called AA batteries, they were commonly called Z batteries, as the ones produced by the Burgess Battery Company were sold as "Number Z" (meant to indicate them being smaller than the "Number 1", which was similar in size to a modern C battery). [ citation needed] Due to their popularity in small flashlights, they are often called "penlight batteries". This battery contained two independent 4.5V batteries, and had a four-pin connector. 9V with a center tap was available by wiring in series. There were two ⌀3.2mm negative pins spaced 9.5mm apart and two ⌀4.0mm positive pins spaced 14.3mm apart. Negative and positive pins were spaced 18.1mm apart. It was used in some early transistor radio amplifiers with a Class B output stage, allowing the loud speaker to be connected between the amplifier output and the battery center tap. This section needs additional citations for verification. Please help improve this article by adding citations to reliable sourcesin this section. Unsourced material may be challenged and removed. ( July 2011) ( Learn how and when to remove this template message) Energizer Alkaline AA Battery Specification" (PDF). Product Datasheet. Energizer . Retrieved October 21, 2015.Bench Test Results: Vapcell Red T20 – 40A 2000mAh 21700…good performer but low capacity". e-cigarette-forum.com. 27 May 2021 . Retrieved 20 June 2023. It's not just disposable batteries that be thrown away like this. If you have a lithium-ion battery for a phone, computer, or other electronic device, it can go in the same bin. If it fits in your hand, it's probably fine to go in a shop's battery bin. Energizer 366 (obsolete)" (PDF). Energizer. Archived (PDF) from the original on 27 February 2017 . Retrieved 19 February 2017.

Used in small RF devices such as key fob-style garage door openers, wireless doorbells, and keyless entry systems where only infrequent pulse current is used. Our tough lab tests have uncovered big differences between the best AA batteries and the worst. Use our results to make sure you don't waste your money. By 2023, several brands of 1.5V Li-ion rechargeable batteries in both AA and AAA sizes (with voltage converting circuitry in even the small AAA casing) were available. They use various charging methods, without the special Kentli ring third electrode. Some have special chargers—a charger for a 1.2V cell will not provide sufficient voltage—but do not use a third electrode. [21] Others have a USB port built into the cell itself. [22] NiZn [ edit ] With quality batteries from top manufacturers like Duracell, Panasonic, AGFAPhoto and more, the batteries from B&M will provide you with all the long lasting power you need. Alkaline Batteries, Rechargeable Batteries and Cell Batteries Energizer No. 415" (PDF). Datasheet.octopart.com. Archived (PDF) from the original on 4 March 2016 . Retrieved 23 February 2015.

The full battery designation identifies not only the size, shape and terminal layout of the battery but also the chemistry (and therefore the voltage per cell) and the number of cells in the battery. For example, a CR123 battery is always LiMnO 2 ('Lithium') chemistry, in addition to its unique size.

In the following table, sizes are shown for the silver-oxide IEC number; types and capacity are identified as "(L)" for alkaline, "(M)" for mercury (no longer manufactured), and "(S)" for silver-oxide. Some sizes may be interchangeably used in battery holders. For example, the 189/389 cell is 3.1mm high and was designated 1131, while the 190/390 size is 3.0mm high and was designated 1130, but a battery holder will accept either size. Likely a better bet for any devices that are going to be in heavy and/or regular use for extended periods of time, especially with higher-drain circuits

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Used in older instruments. [242] the RegencyTR-1 (first transistor radio) and old battery–capacitor flashes. These are also sometimes known as B batteries, but are very distinct from actual B cell batteries.