The Alkaline AAA battery (or LR03 battery) is a standard size of dry cell battery. One or more AAA batteries are commonly used in low-drain portable electronic devices. An alkaline battery in this size is designated by IEC as LR03, by ANSI C18.1 as 24, by old JIS standard as AM-4, and by other manufacturer and national standard designations that vary depending on the cell chemistry. The size was first introduced by The American Ever Ready Company in 1911.