#voltaic_battery__galvanic_battery  battery consisting of a number of voltaic cells arranged in series or parallel
  supertype:  #electric_battery__battery  a device that produces electricity; may have several primary or secondary cells arranged in parallel or series
  part:  #voltaic_cell
  subtype:  #dry_battery__drybattery  a voltaic battery consisting of two or more dry cells
     subtype:  #flashlight_battery  a small dry battery containing dry cells; used to power flashlights
  subtype:  #storage_battery__storagebattery__accumulator  a voltaic battery that stores electric charge
     subtype:  #lead-acid_battery__lead-acid_accumulator  a battery with lead electrodes with dilute sulphuric acid as the electrolyte; each cell generates about 2 volts
        subtype:  #car_battery__carbattery__automobile_battery  a lead-acid storage battery in a motor vehicle; usually a 12-volt battery of six cells; the heart of the car's electrical system
     subtype:  #nicad__nickelcadmiumaccumulator  a rechargeable battery with a nickel cathode and a cadmium anode; often used in emergency systems because of its low discharge rate when not in use
     subtype:  #nickel-iron_battery__nickel-iron_accumulator  a storage battery having a nickel oxide cathode and an iron anode with an electrolyte of potassium hydroxide; each cell gives about 1.2 volts

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