Primary (non-rechargeable) zinc–carbon ( dry cell) AA batteries have around 400–900 milliampere hours capacity, with measured capacity highly dependent on test conditions, duty cycle, and cut-off voltage. 14500 Lithium Batteries are longer if they feature a protection circuit up to 53 mm.Īlkaline AA cells have a weight of roughly 23 g (0.81 oz), lithium AA cells around 15 g (0.53 oz), and rechargeable Ni-MH cells around 31 g (1.1 oz). The positive terminal button should be a minimum 1 mm high and a maximum 5.5 mm in diameter, the flat negative terminal should be a minimum diameter of 7 mm. Due to their popularity in small flashlights, they are often called "penlight batteries".ĭ, C, AA, AAA, AAAA cells, and a 9-volt batteryĪn AA cell measures 49.2–50.5 mm (1.94–1.99 in) in length, including the button terminal-and 13.5–14.5 mm (0.53–0.57 in) in diameter.
ANSI and IEC battery nomenclature gives several designations for cells in this size, depending on cell features and chemistry. Introduced in 1907 by The American Ever Ready Company, 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. The exact terminal voltage, capacity and practical discharge rates depend on cell chemistry however, devices designed for AA cells will usually only take 1.2–1.5 V unless specified by the manufacturer. Several different chemistries are used in their construction. An AA battery is composed of a single electrochemical cell that may be either a primary battery (disposable) or a rechargeable battery.
1.5 VOLT BATTERY LIFE PORTABLE
ĪA batteries are common in portable electronic devices. Historically, it is known as D14 (hearing aid battery), U12 – later U7 (standard cell), or HP7 (for zinc chloride 'high power' version) in official documentation in the United Kingdom, or a pen cell. The IEC 60086 system calls the size R6, and ANSI C18 calls it 15. The AA battery (or double-A battery) is a standard size single cell cylindrical dry battery.
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