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AAAA battery

Left to right: D, C, AA, AAA, AAAA, and 9-volt batteries

The AAAA battery (usually read as quadruple-A) is 42.5 mm long and 8.3 mm in diameter. The alkaline cell weighs around 6.5 g and produces 1.5 V. This size battery is also classified as R8D425 (IEC)[1] and 25 (ANSI/NEDA). The alkaline battery in this size is also known by Duracell type number MN2500 or MX2500 and Energizer type number E96.


Energizer created the first AAAA battery in 1989, pressured by environmental initiatives to eliminate added mercury in batteries.[2] Now most big battery manufactures (Energizer, Duracell), sell AAAA batteries.


  Zinc–carbon Alkaline NiCd NiMH Li-ion[3][4]
IEC name R8D425 LR8D425 KR8D425 HR8D425  
ANSI/NEDA name 25D 25A      
Typical capacity 300 mAh 500–600 mAh   325–500 mAh 160–170 mAh
Nominal voltage 1.50 V 1.50 V 1.25 V 1.25 V 3.7 V


The opening of a 9-volt battery to reveal six LR61 cells, which are similar to AAAA cells.

This battery size is most often used in small devices such as laser pointers, LED penlights, powered computer styluses, glucose meters, and small headphone amplifiers, with Microsoft's Surface Pen the most prominent product taking AAAA batteries. These batteries are not as popular as AAA or AA type batteries, and consequently are not as commonly available.

Some models of alkaline nine-volt battery contain six LR61 cells[5] connected by welded tabs. These cells are similar to AAAA cells and can be used in their place in some devices, even though they are 3.5 millimetres (0.14 in) shorter.

See also


  1. ^ IEC 60086-2-2011, p. 15.
  2. ^ "When did aaaa batteries come out?". Retrieved 2022-03-20.
  3. ^ "Miniature Rechargeable Series" (PDF). GP Batteries. Archived from the original (PDF) on 6 December 2011. Retrieved 28 November 2011.
  4. ^ "GP Rechargeable Batteries". GP Batteries. Archived from the original (Web) on 7 March 2012. Retrieved 28 November 2011.
  5. ^ Jostes, Dr. Rainer (2014-01-20). "MSDS 03 Primary Alkaline Cylindrical Series P EN" (PDF). VARTA. Archived from the original (PDF) on 2014-02-22. Retrieved 2014-02-08.
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AAAA battery
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