Exam Question
(a) Sketch and describe the working of a Lead-Acid battery. (12)
(b) What routine maintenance is carried out on these batteries? (6)
Class 4 (4th Engineer)
MET
📅 Jan 2026
Reference Answer
### (a) Sketch and Describe the Working of a Lead-Acid Battery
#### 1. Construction
A lead-acid battery is an electrochemical device that converts chemical energy into electrical energy (discharging) and vice versa (charging). A single cell produces a nominal voltage of approximately 2.1 Volts. For higher voltages, such as 12V or 24V, multiple cells (6 or 12 respectively) are connected in series within a common casing.
The main components of a single cell are:
#### 1. Construction
A lead-acid battery is an electrochemical device that converts chemical energy into electrical energy (discharging) and vice versa (charging). A single cell produces a nominal voltage of approximately 2.1 Volts. For higher voltages, such as 12V or 24V, multiple cells (6 or 12 respectively) are connected in series within a common casing.
The main components of a single cell are:
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