AAA battery

noun

ˈtri-pəl-ˈā- 

variants or less commonly AAA cell or AAA

plural AAA batteries also AAA cells or AAAs

: a small battery that is typically used in small electronic devices and that is standardized at 44 mm in length and 10.5 mm in diameter

Examples of AAA battery in a Sentence

Recent Examples on the Web

This system includes a rechargeable battery that lasts around four months and comes with a set of AAA batteries in case of emergencies. — Juhi Wadia, PC Magazine, 21 June 2026

Plus, the remote uses AAA batteries, which are cheaper and easier to replace than the coin-cell batteries found in most remotes. — Jennifer Pattison Tuohy, The Verge, 15 Apr. 2026

To put that in perspective, the largest spike is roughly the length of a AAA battery, protruding from the skin of an animal about the size of an alligator. — Ryan Brennan, Kansas City Star, 12 Feb. 2026

Make sure to include a roll of film and a AAA battery so whoever wins can start snapping photos right away. — Nena Farrell, Wired News, 20 Oct. 2025

Word History

First Known Use

1960, in the meaning defined above

Rhymes for AAA battery

• flattery
• slattery