This diagnostic process assesses the state of cost in lead-acid storage cells. It depends on measuring the precise gravity of the electrolyte answer. A specialised instrument is used to attract a pattern of the electrolyte; the instrument then signifies the precise gravity by way of a graduated scale. As an illustration, a studying of 1.265 signifies a totally charged cell, whereas a studying under 1.100 signifies a discharged state.
The worth of this evaluation stems from its means to supply a direct indication of the sulfuric acid focus inside the electrolyte. This focus immediately correlates with the power saved inside the cell. Common implementation of this test aids in figuring out failing cells inside a multi-cell battery financial institution, stopping untimely battery failure and making certain constant energy output. Traditionally, this methodology supplied a comparatively cheap and easy technique of evaluating battery well being earlier than superior digital testing grew to become commonplace.