Question 431Electricity & Electronics - QMED

The correct answer is A) to prevent excessive gassing and overheating. As a lead-acid battery nears its full charge capacity, the charging rate should be reduced to prevent excessive gassing and overheating. When a lead-acid battery is charged, the chemical reactions inside the battery produce hydrogen gas as a byproduct. Towards the end of the charging cycle, the rate of gas production increases significantly. Reducing the charging rate helps to limit this excessive gassing, which can lead to safety issues and damage to the battery. The other answer choices are incorrect because: B) increasing lead peroxide formation is not the primary reason for reducing the charging rate, C) reducing lead sulfate deposits is more important during the initial stages of charging, and D) equalizing cell voltages is not the main purpose for reducing the charging rate as the battery nears full charge.