battery

/'bætəri/
Noun
  1. an assault in which the assailant makes physical contact
  2. the heavy fire of artillery to saturate an area rather than hit a specific target
    • they laid down a barrage in front of the advancing troops
    • the shelling went on for hours without pausing
  3. a series of stamps operated in one mortar for crushing ores
  4. a unit composed of the pitcher and catcher
  5. a collection of related things intended for use together
    • took a battery of achievement tests
  6. a device that produces electricity; may have several primary or secondary cells arranged in parallel or series
  7. group of guns or missile launchers operated together at one place

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battery
A child replaces the battery in a remote-controlled car.