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What is a maintenance-free battery?

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in Automobile Engineering by (80.5k points)
What is a maintenance-free battery?

(a) A battery having lead-antimony plate grid

(b) A battery having lead-calcium plate grid

(c) A battery does not contain acid

(d) A battery does not contain water

This question was posed to me by my school teacher while I was bunking the class.

This intriguing question originated from Storage Batteries topic in section Nonconventional Engines, Conventional Energy Sources & Cooling System of Automobile Engineering

1 Answer

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Correct answer is (b) A battery having lead-calcium plate grid

Best explanation: A maintenance-free battery is a battery having a lead-calcium plate grid. The battery which uses this plate grid loses water very slowly.

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