Battery Basics

16 of 33


ELECTROLYTE
Battery electrolyte is a mixture of 64% distilled water (H20) and 36% sulfuric acid (SO4). Batteries today have an electrolyte with a specific gravity of 1.270 (at 20'C, 68'F) when fully charged. Specific Gravity is the weight of a given volume of liquid in comparison to the weight of the same volume of water. The higher the specific gravity of a liquid the denser (thicker) it is. Testing specific gravity will be discussed in the Battery Service Module.