What is battery sulfation and why does it cause battery failure ?
Each time a battery is discharged some of the sulfuric acid in the electrolyte is converted to lead sulfate crystals which form on the plates. These crystals interfere with the chemical reaction neccessary for proper battery operation. When the battery is recharged MOST (but not all) the sulfates are reconverted back into sulfuric acid. This is why a discharged battery will have a low Specific Gravity (SG) reading. Over time the sulfates which are not reconstituted as acid form stubborn patches of large crystal growths that will grow and eventually choke the life out of a lead acid battery. These crystal growths if not stopped will act like ice expanding the cases (bulges), breaking the plates and plate and cell interconnects and causing shorts.
