| AAA Batteries |
A triple A or AAA battery is a standard size of dry cell battery commonly used in portable electronic devices. A carbon-zinc battery in this size is designated by ANSI C18.1 as "24", by IEC as "R03", 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. Alkaline AAA batteries weigh around 11.5 grams each, while lithium AAAs weigh about 7.6 g. Rechargeable NiMH AAAs typically weigh 14-15 g. As for all other sizes, the nominal voltage of carbon-zinc, alkaline and lithium-iron sulphide cells is 1.5 V, while that of NiMH or NiCd cells is 1.2 V. The capacity of an alkaline AAA is typically 900 to 1,155 mA·h (3240 to 4158 coulombs).
NiMH AAA Batteries
AAA batteries are commonly 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. However, with the increasing efficiency and miniaturization of modern electronics, many devices which previously were designed for AA batteries—remote controls, computer mice, and keyboards—are being replaced by models that accept AAA cells. |
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9V Batteries 
