If your vehicle has a so-called "maintenance-free" battery, do you need to take any care of it?
A)No, since it is maintenance-free.
B)Yes, clean the terminals and protect them with grease.Correct
C)Yes, cover the plates with distilled water.
With a so-called "maintenance-free" battery we should not worry about the electrolyte, that is, the mixture of distilled water and sulphuric acid. We will only need to pay attention to the fastening of the terminals so that they are well tightened, clean and covered with grease.