Definitions of battery:

• noun:   an assault in which the assailant makes physical contact
• noun:   a device that produces electricity; may have several primary or secondary cells arranged in parallel or series
• noun:   a series of stamps operated in one mortar for crushing ores
• noun:   a collection of related things intended for use together

  Example: "Took a battery of achievement tests"

• noun:   a unit composed of the pitcher and catcher
• noun:   group of guns or missile launchers operated together at one place
• noun:   the heavy fire of artillery to saturate an area rather than hit a specific target