Concept:An alkaline accumulator is a rechargeable secondary cell, but its internal resistance is generally higher than that of a lead-acid accumulator.
Explanation:Alkaline accumulators have an electrolyte that is sealed and needs very little attention, so statement A is a true advantage.
Being a secondary cell, it can be recharged after use, so statement B is a true advantage.
The construction of alkaline accumulators gives them a much longer service life than lead-acid accumulators, so statement D is a true advantage.
However, alkaline accumulators have high internal resistance, not low internal resistance.
Low internal resistance is typically associated with lead-acid accumulators instead.
Therefore, the statement claiming low internal resistance as an advantage is not correct for an alkaline accumulator.
Answer:C. It has low internal resistance