Pencil Battery AA
An AA battery (also called "double A" or Mignon battery) is a standard size of a single cell cylindrical dry battery; in the IEC system it is designated size "R6" and "15" by ANSI . AA batteries are commonly used in portable electronic devices. An AA battery is composed of a single electrochemical cell that may be either a primary battery (disposable) or a rechargeable battery. The exact terminal voltage and capacity of an AA size battery depends on the cell chemistry. AA batteries account for over 50% of general battery sales.