AAA Batteries
The triple A or AAA battery is a standard sized battery smaller than the AA which, because of its size, has become popular for powering small electronic devices. A single cell battery, the AAA measures 44.5 mmm in length and 10.5 mm in diameter. As with the AA battery the nominal voltage of the carbon zinc, alkaline and lithium-iron sulphide variants is 1.5 volts whilst the NiMH (Nickel-metal hydride) and NiCd (Nickel-cadnium) types are 1.2 volts. The capacity of the alkaline triple A varies on test conditions and usage is limited to usually between 900 - 1155 milliamp hours - this is only about a third of that available from a standard triple AAA battery! Recently, though, modern electronic devices have greatly increased their efficiency and so the AAA is lasting relatively longer. Being smaller means that the devices they power can also be made smaller.
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