![]() Place the cleaned battery on the battery compartment and screw it in place. Repeat the procedure with the connectors.Ĭheck the battery carrier for signs of corrosion and make sure there are no mixing screws. Pour the ingredients into a container and wash the top and side of the battery with a soft brush. All you need is some baking soda, water, and a soft brush. If the battery has cracks, you must replace it.īefore you put the battery back in the battery carrier, you must clean it. Next, inspect the battery terminals and look at the insulation. Doming of the battery is the result of overcharging. Place the battery on a flat surface and check that no bulge has formed on the surface of the battery. To do this, you must first disconnect the battery terminals and then remove the battery from the car. Larger discrepancies in the measured values indicate that the battery is sulfated.Ī physical examination of the car battery is essential to detect any cracks. Repeat the test with the other cells.Ī functioning battery will have a reading between 1.265 and 1.299, while a reading below this indicates an undercharged battery. Make a note of the measured value for the specific gravity of the electrolyte. As soon as you release the lid, the electrolyte flows into the hydrometer. Drop your hydrometer into the first cell and press the hydrometer cover together. To begin, open the plate covers on the top of the battery. Also, do not use a metal thermometer for the electrolyte temperature because of reactions with the acid. You will find some models that adjust themselves, while some come with a conversion table.īattery acid is dangerous, and you must wear gloves when working with acid. For best results, buy a hydrometer with a thermometer. If the acid is weak, the battery is working properly. The hydrometer is used to check the degree of acidity in the battery plates.
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