AA Batteries

AA batteries are used in electronic devices. Some models of digital cameras, toys, and household items such as wall clocks and radios, use it as a power source. It has a measurement of 51 millimetres in length including the button terminal and 13.5 to 14.5 millimetres in diameter. Its mass depends on the type.

The types of AA batteries are nickel cadmium (NiCD) or KR157/51, alkaline or LR6, nickel metal hydride (NiMH) or HR6, carbon zinc or R6, lithium iron sulphide or FR6, MN1500, HP7 and Mignon (the colloquial term in Germany). AA is made of a single electrochemical cell. The lithium type has about 15 grams in mass while the alkaline battery is 23 grams and the rechargeable NiMH has roughly 31 grams.

The nominal output voltage of AA batteries differs depending on the type. NiMH and NiCD rechargeable batteries usually have 1.2 volts nominal voltage while a single-use type has 1.5 volts. Other types can go as high as 1.6 volts.

Although AA batteries have the same voltage as AAA cell, the former are more durable than the latter because of its size. The bigger AA cell can pack greater mass of anode material. C cell and D cell which are even larger can provide power for a longer time.