🔍 Key Concepts

• Proper maintenance procedures for lead-acid batteries • The purpose and required purity of the liquid added to a battery • Why contaminants in the added liquid can damage a battery

💭 Think About

• What is the electrolyte in a lead-acid battery actually made of, and what part of it is lost during evaporation? • If you add a liquid that contains minerals or salts, how might that affect the battery plates and the chemical reaction? • When topping off a battery, are you trying to change the chemical strength of the electrolyte, or just restore its level above the plates?

✅ Before You Answer

• Identify which choice uses the correct type of water typically recommended for lead-acid batteries • Confirm that the liquid you add should not introduce impurities or extra chemicals into the cell • Make sure the choice you select matches the normal topping-off practice (not completely refilling or replacing the electrolyte)