AA battery
noun
Definition of AA battery
: a battery that is typically used in small electronic devices and that is standardized at 51 mm in length and roughly 14 mm in diameter —called also AA, AA cell, double-A, double-A battery
From the M-W Editors
First Known Use of aa battery
1961
Seen and Heard
What made you want to look up AA battery? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!