Answer:
a. sulfur.
Explanation:
Accelerated self-discharge: This accelerated process occurs when it exceeds the value specified in normal self-discharge.
- Moisture of the external parts of the battery during electrolyte placement or during handling.
- During the charging process, due to gas leakage which drags sulfuric acid particles from the electrolyte to the outside of the battery.
- When the battery has internal leakage in the vessels.
- In electrolyte contamination by organic materials.
