Question

Which of the following is not a reason for the self-discharge of the battery?

(a) Contamination of electrolyte

(b) Damaged separators

(c) Long term storage

(d) Use of distilled water for electrolyte

I had been asked this question in semester exam.

Question is taken from Battery Troubles topic in section Storage Batteries of Automotive Engine Design

Answer 1

The correct option is (d) Use of distilled water for electrolyte

To explain I would say: The main cause for self-discharging of the battery are contamination of the electrolyte, damaged separators and long time storage. By using pure sulphuric acid and distilled water for preparing electrolyte helps in the life of the battery.