noun, noun which may take the genitive case particle 'no'
N size battery
Refers to the N-size cylindrical battery (IEC designation LR1). Often used in small electronic devices.
このリモコンは単５型の電池を使います。
This remote control uses N size batteries.
単５型の乾電池はあまり一般的ではない。
N size dry cells are not very common.
Compound of 単 (single/cell) + ５ (number 5) + 型 (type/model), following the Japanese battery size naming convention.