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Which symptom accompanies persistent overcharging?

  • A.Slow cranking, which follows from the battery being unable to accept the charge delivered to it by the alternator
  • B.A flat battery
  • C.Corrosion of the negative terminal only, which is attacked by the gases produced during the excessive charging
  • D.Loss of electrolyte and a strong acid smell

Answer: D

Boiling drives water off as gas and the cells run dry, while the case may bulge. Overcharging eventually destroys the battery and can produce a flat one, which makes the third option a genuine end result rather than an immediate symptom. Checking which component actually carries the load settles most questions of this kind at once. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb.

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