noun
C battery; C cell
Abbreviation of 単二型乾電池. Used in everyday contexts for the common cylindrical battery size.
リモコンに単２の電池を入れてください。
Please put C batteries in the remote control.
Full formal term for C battery; 単２ is the common abbreviation.
D battery; larger size.
AA battery; smaller size.
Abbreviation of 単二型乾電池 (tan-ni-gata kandenchi, 'type-2 single-cell dry battery'). The numeral indicates the size category.