noun, noun which may take the genitive case particle 'no'
AA size (battery)
Refers specifically to the AA battery form factor, commonly used in remote controls, toys, and small electronics.
このリモコンは単三型の電池を使います。
This remote control uses AA batteries.
単三型の充電池を買ってきた。
I bought some AA rechargeable batteries.
Compound of 単三 (abbreviation of 単三形, from 単 cell + 三 three, referring to the third standard size in the Japanese battery classification) + 型 type.