Definitions:
a container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power

a fortified emplacement for heavy guns

a set of similar units of equipment, typically when connected together

a series of small cages for the intensive rearing of farm animals, especially calves and poultry

the infliction of unlawful personal violence on another person, even where the contact does no physical harm

the pitcher and the catcher.