A4 Quattro Cabriolet V6-3.2L (BKH) (2007)
Battery: Component Tests and General Diagnostics
Electrolyte Density In All Cells, Checking
Electrolyte Density In All Cells, Checking
Special tools and equipment
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Hydrometer, commercial type
WARNING:
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Always pay attention to accident prevention regulations when handling electrolyte. Suitable protective clothing must be worn.
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When disposing of batteries it is absolutely necessary that disposal Procedures for batteries and sulfuric acid are observed.
NOTE:
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In conjunction with "voltage under load" test, electrolyte density test gives a good indication of battery condition.
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Electrolyte temperature must be at least 10 degrees C.
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The electrolyte density can be checked immediately after battery charging.
Test sequence
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Remove all battery plugs (battery cell sealing plugs).
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Immerse hydrometer in one of the cells and draw in electrolyte until float is freely suspended in electrolyte.
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The greater the specific density of electrolyte drawn in, the higher the float will sit.
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The specific gravity in kg/cu.dm can be read off from the hydrometer scale.
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Read off measured value on hydrometer and compare with values listed in table: