The AAAA battery (commonly referred to as quad-A) is 42.5 mm long and 8.3 mm in diameter, weighs about 6.5 g and produces 1.5 V. This battery is also classified as LR8D425. o LR61 (IEC) and 25A (ANSI/NEDA). The battery is also known by its Duracell type number MN2500 or MX2500 and Energizer type E96.

This size of battery is most commonly used in devices that require small batteries, such as laser pointers, LED flashlights, glucose meters, and small headphones. These batteries are not as popular as AAA or AA batteries and can be very difficult to find. However, a typical 9-volt alkaline battery may consist of a pack of six AAAA cells, connected together by tabs or soldered circuit boards.

If disassembled, most 9-volt batteries can provide power for AAAA batteries. The average capacity of AAAA alkaline batteries is about 595 mAh.

• - Brand: Duracell
• -Type: AAAA
• - Technology: alkaline
• - Voltage: 1.5 V
• - Uses: Bluetooth headsets, remote controls, medical equipment...